diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/backing-dev.c | 17 | ||||
| -rw-r--r-- | mm/debug.c | 28 | ||||
| -rw-r--r-- | mm/early_ioremap.c | 2 | ||||
| -rw-r--r-- | mm/frame_vector.c | 14 | ||||
| -rw-r--r-- | mm/gup.c | 64 | ||||
| -rw-r--r-- | mm/huge_memory.c | 36 | ||||
| -rw-r--r-- | mm/hugetlb.c | 12 | ||||
| -rw-r--r-- | mm/hwpoison-inject.c | 2 | ||||
| -rw-r--r-- | mm/kasan/report.c | 8 | ||||
| -rw-r--r-- | mm/kmemcheck.c | 1 | ||||
| -rw-r--r-- | mm/kmemleak.c | 4 | ||||
| -rw-r--r-- | mm/ksm.c | 9 | ||||
| -rw-r--r-- | mm/madvise.c | 6 | ||||
| -rw-r--r-- | mm/memcontrol.c | 4 | ||||
| -rw-r--r-- | mm/memory-failure.c | 48 | ||||
| -rw-r--r-- | mm/memory.c | 13 | ||||
| -rw-r--r-- | mm/mlock.c | 2 | ||||
| -rw-r--r-- | mm/mmap.c | 18 | ||||
| -rw-r--r-- | mm/mprotect.c | 6 | ||||
| -rw-r--r-- | mm/oom_kill.c | 11 | ||||
| -rw-r--r-- | mm/page-writeback.c | 5 | ||||
| -rw-r--r-- | mm/page_alloc.c | 26 | ||||
| -rw-r--r-- | mm/page_io.c | 4 | ||||
| -rw-r--r-- | mm/page_owner.c | 1 | ||||
| -rw-r--r-- | mm/page_vma_mapped.c | 66 | ||||
| -rw-r--r-- | mm/percpu.c | 4 | ||||
| -rw-r--r-- | mm/shmem.c | 10 | ||||
| -rw-r--r-- | mm/slab.c | 23 | ||||
| -rw-r--r-- | mm/sparse.c | 2 | ||||
| -rw-r--r-- | mm/swapfile.c | 2 | ||||
| -rw-r--r-- | mm/vmscan.c | 3 | ||||
| -rw-r--r-- | mm/zsmalloc.c | 1 |
32 files changed, 285 insertions, 167 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 74b52df..b5f940c 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -113,11 +113,23 @@ static const struct file_operations bdi_debug_stats_fops = { .release = single_release, }; -static void bdi_debug_register(struct backing_dev_info *bdi, const char *name) +static int bdi_debug_register(struct backing_dev_info *bdi, const char *name) { + if (!bdi_debug_root) + return -ENOMEM; + bdi->debug_dir = debugfs_create_dir(name, bdi_debug_root); + if (!bdi->debug_dir) + return -ENOMEM; + bdi->debug_stats = debugfs_create_file("stats", 0444, bdi->debug_dir, bdi, &bdi_debug_stats_fops); + if (!bdi->debug_stats) { + debugfs_remove(bdi->debug_dir); + return -ENOMEM; + } + + return 0; } static void bdi_debug_unregister(struct backing_dev_info *bdi) @@ -129,9 +141,10 @@ static void bdi_debug_unregister(struct backing_dev_info *bdi) static inline void bdi_debug_init(void) { } -static inline void bdi_debug_register(struct backing_dev_info *bdi, +static inline int bdi_debug_register(struct backing_dev_info *bdi, const char *name) { + return 0; } static inline void bdi_debug_unregister(struct backing_dev_info *bdi) { @@ -50,7 +50,7 @@ void __dump_page(struct page *page, const char *reason) */ int mapcount = PageSlab(page) ? 0 : page_mapcount(page); - pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx", + pr_emerg("page:%px count:%d mapcount:%d mapping:%px index:%#lx", page, page_ref_count(page), mapcount, page->mapping, page_to_pgoff(page)); if (PageCompound(page)) @@ -69,7 +69,7 @@ void __dump_page(struct page *page, const char *reason) #ifdef CONFIG_MEMCG if (page->mem_cgroup) - pr_alert("page->mem_cgroup:%p\n", page->mem_cgroup); + pr_alert("page->mem_cgroup:%px\n", page->mem_cgroup); #endif } @@ -84,10 +84,10 @@ EXPORT_SYMBOL(dump_page); void dump_vma(const struct vm_area_struct *vma) { - pr_emerg("vma %p start %p end %p\n" - "next %p prev %p mm %p\n" - "prot %lx anon_vma %p vm_ops %p\n" - "pgoff %lx file %p private_data %p\n" + pr_emerg("vma %px start %px end %px\n" + "next %px prev %px mm %px\n" + "prot %lx anon_vma %px vm_ops %px\n" + "pgoff %lx file %px private_data %px\n" "flags: %#lx(%pGv)\n", vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next, vma->vm_prev, vma->vm_mm, @@ -100,27 +100,27 @@ EXPORT_SYMBOL(dump_vma); void dump_mm(const struct mm_struct *mm) { - pr_emerg("mm %p mmap %p seqnum %d task_size %lu\n" + pr_emerg("mm %px mmap %px seqnum %d task_size %lu\n" #ifdef CONFIG_MMU - "get_unmapped_area %p\n" + "get_unmapped_area %px\n" #endif "mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu\n" - "pgd %p mm_users %d mm_count %d pgtables_bytes %lu map_count %d\n" + "pgd %px mm_users %d mm_count %d pgtables_bytes %lu map_count %d\n" "hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx\n" "pinned_vm %lx data_vm %lx exec_vm %lx stack_vm %lx\n" "start_code %lx end_code %lx start_data %lx end_data %lx\n" "start_brk %lx brk %lx start_stack %lx\n" "arg_start %lx arg_end %lx env_start %lx env_end %lx\n" - "binfmt %p flags %lx core_state %p\n" + "binfmt %px flags %lx core_state %px\n" #ifdef CONFIG_AIO - "ioctx_table %p\n" + "ioctx_table %px\n" #endif #ifdef CONFIG_MEMCG - "owner %p " + "owner %px " #endif - "exe_file %p\n" + "exe_file %px\n" #ifdef CONFIG_MMU_NOTIFIER - "mmu_notifier_mm %p\n" + "mmu_notifier_mm %px\n" #endif #ifdef CONFIG_NUMA_BALANCING "numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d\n" diff --git a/mm/early_ioremap.c b/mm/early_ioremap.c index d04ac1e..1826f19 100644 --- a/mm/early_ioremap.c +++ b/mm/early_ioremap.c @@ -111,7 +111,7 @@ __early_ioremap(resource_size_t phys_addr, unsigned long size, pgprot_t prot) enum fixed_addresses idx; int i, slot; - WARN_ON(system_state != SYSTEM_BOOTING); + WARN_ON(system_state >= SYSTEM_RUNNING); slot = -1; for (i = 0; i < FIX_BTMAPS_SLOTS; i++) { diff --git a/mm/frame_vector.c b/mm/frame_vector.c index 2f98df0..c64dca6 100644 --- a/mm/frame_vector.c +++ b/mm/frame_vector.c @@ -53,6 +53,20 @@ int get_vaddr_frames(unsigned long start, unsigned int nr_frames, ret = -EFAULT; goto out; } + + /* + * While get_vaddr_frames() could be used for transient (kernel + * controlled lifetime) pinning of memory pages all current + * users establish long term (userspace controlled lifetime) + * page pinning. Treat get_vaddr_frames() like + * get_user_pages_longterm() and disallow it for filesystem-dax + * mappings. + */ + if (vma_is_fsdax(vma)) { + ret = -EOPNOTSUPP; + goto out; + } + if (!(vma->vm_flags & (VM_IO | VM_PFNMAP))) { vec->got_ref = true; vec->is_pfns = false; @@ -1095,6 +1095,70 @@ long get_user_pages(unsigned long start, unsigned long nr_pages, } EXPORT_SYMBOL(get_user_pages); +#ifdef CONFIG_FS_DAX +/* + * This is the same as get_user_pages() in that it assumes we are + * operating on the current task's mm, but it goes further to validate + * that the vmas associated with the address range are suitable for + * longterm elevated page reference counts. For example, filesystem-dax + * mappings are subject to the lifetime enforced by the filesystem and + * we need guarantees that longterm users like RDMA and V4L2 only + * establish mappings that have a kernel enforced revocation mechanism. + * + * "longterm" == userspace controlled elevated page count lifetime. + * Contrast this to iov_iter_get_pages() usages which are transient. + */ +long get_user_pages_longterm(unsigned long start, unsigned long nr_pages, + unsigned int gup_flags, struct page **pages, + struct vm_area_struct **vmas_arg) +{ + struct vm_area_struct **vmas = vmas_arg; + struct vm_area_struct *vma_prev = NULL; + long rc, i; + + if (!pages) + return -EINVAL; + + if (!vmas) { + vmas = kcalloc(nr_pages, sizeof(struct vm_area_struct *), + GFP_KERNEL); + if (!vmas) + return -ENOMEM; + } + + rc = get_user_pages(start, nr_pages, gup_flags, pages, vmas); + + for (i = 0; i < rc; i++) { + struct vm_area_struct *vma = vmas[i]; + + if (vma == vma_prev) + continue; + + vma_prev = vma; + + if (vma_is_fsdax(vma)) + break; + } + + /* + * Either get_user_pages() failed, or the vma validation + * succeeded, in either case we don't need to put_page() before + * returning. + */ + if (i >= rc) + goto out; + + for (i = 0; i < rc; i++) + put_page(pages[i]); + rc = -EOPNOTSUPP; +out: + if (vmas != vmas_arg) + kfree(vmas); + return rc; +} +EXPORT_SYMBOL(get_user_pages_longterm); +#endif /* CONFIG_FS_DAX */ + /** * populate_vma_page_range() - populate a range of pages in the vma. * @vma: target vma diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 86fe697..0e7ded9 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -842,20 +842,15 @@ EXPORT_SYMBOL_GPL(vmf_insert_pfn_pud); #endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */ static void touch_pmd(struct vm_area_struct *vma, unsigned long addr, - pmd_t *pmd) + pmd_t *pmd, int flags) { pmd_t _pmd; - /* - * We should set the dirty bit only for FOLL_WRITE but for now - * the dirty bit in the pmd is meaningless. And if the dirty - * bit will become meaningful and we'll only set it with - * FOLL_WRITE, an atomic set_bit will be required on the pmd to - * set the young bit, instead of the current set_pmd_at. - */ - _pmd = pmd_mkyoung(pmd_mkdirty(*pmd)); + _pmd = pmd_mkyoung(*pmd); + if (flags & FOLL_WRITE) + _pmd = pmd_mkdirty(_pmd); if (pmdp_set_access_flags(vma, addr & HPAGE_PMD_MASK, - pmd, _pmd, 1)) + pmd, _pmd, flags & FOLL_WRITE)) update_mmu_cache_pmd(vma, addr, pmd); } @@ -884,7 +879,7 @@ struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr, return NULL; if (flags & FOLL_TOUCH) - touch_pmd(vma, addr, pmd); + touch_pmd(vma, addr, pmd, flags); /* * device mapped pages can only be returned if the @@ -995,20 +990,15 @@ out: #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD static void touch_pud(struct vm_area_struct *vma, unsigned long addr, - pud_t *pud) + pud_t *pud, int flags) { pud_t _pud; - /* - * We should set the dirty bit only for FOLL_WRITE but for now - * the dirty bit in the pud is meaningless. And if the dirty - * bit will become meaningful and we'll only set it with - * FOLL_WRITE, an atomic set_bit will be required on the pud to - * set the young bit, instead of the current set_pud_at. - */ - _pud = pud_mkyoung(pud_mkdirty(*pud)); + _pud = pud_mkyoung(*pud); + if (flags & FOLL_WRITE) + _pud = pud_mkdirty(_pud); if (pudp_set_access_flags(vma, addr & HPAGE_PUD_MASK, - pud, _pud, 1)) + pud, _pud, flags & FOLL_WRITE)) update_mmu_cache_pud(vma, addr, pud); } @@ -1031,7 +1021,7 @@ struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr, return NULL; if (flags & FOLL_TOUCH) - touch_pud(vma, addr, pud); + touch_pud(vma, addr, pud, flags); /* * device mapped pages can only be returned if the @@ -1424,7 +1414,7 @@ struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, page = pmd_page(*pmd); VM_BUG_ON_PAGE(!PageHead(page) && !is_zone_device_page(page), page); if (flags & FOLL_TOUCH) - touch_pmd(vma, addr, pmd); + touch_pmd(vma, addr, pmd, flags); if ((flags & FOLL_MLOCK) && (vma->vm_flags & VM_LOCKED)) { /* * We don't mlock() pte-mapped THPs. This way we can avoid diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 681b300..9a334f5 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3125,6 +3125,13 @@ static void hugetlb_vm_op_close(struct vm_area_struct *vma) } } +static int hugetlb_vm_op_split(struct vm_area_struct *vma, unsigned long addr) +{ + if (addr & ~(huge_page_mask(hstate_vma(vma)))) + return -EINVAL; + return 0; +} + /* * We cannot handle pagefaults against hugetlb pages at all. They cause * handle_mm_fault() to try to instantiate regular-sized pages in the @@ -3141,6 +3148,7 @@ const struct vm_operations_struct hugetlb_vm_ops = { .fault = hugetlb_vm_op_fault, .open = hugetlb_vm_op_open, .close = hugetlb_vm_op_close, + .split = hugetlb_vm_op_split, }; static pte_t make_huge_pte(struct vm_area_struct *vma, struct page *page, @@ -4627,7 +4635,9 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, pte_t *pte = NULL; pgd = pgd_offset(mm, addr); - p4d = p4d_offset(pgd, addr); + p4d = p4d_alloc(mm, pgd, addr); + if (!p4d) + return NULL; pud = pud_alloc(mm, p4d, addr); if (pud) { if (sz == PUD_SIZE) { diff --git a/mm/hwpoison-inject.c b/mm/hwpoison-inject.c index 356df05..b6ac706 100644 --- a/mm/hwpoison-inject.c +++ b/mm/hwpoison-inject.c @@ -52,7 +52,7 @@ static int hwpoison_inject(void *data, u64 val) inject: pr_info("Injecting memory failure at pfn %#lx\n", pfn); - return memory_failure(pfn, 18, MF_COUNT_INCREASED); + return memory_failure(pfn, MF_COUNT_INCREASED); put_out: put_hwpoison_page(p); return 0; diff --git a/mm/kasan/report.c b/mm/kasan/report.c index 6bcfb01..410c823 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -134,7 +134,7 @@ static void print_error_description(struct kasan_access_info *info) pr_err("BUG: KASAN: %s in %pS\n", bug_type, (void *)info->ip); - pr_err("%s of size %zu at addr %p by task %s/%d\n", + pr_err("%s of size %zu at addr %px by task %s/%d\n", info->is_write ? "Write" : "Read", info->access_size, info->access_addr, current->comm, task_pid_nr(current)); } @@ -206,7 +206,7 @@ static void describe_object_addr(struct kmem_cache *cache, void *object, const char *rel_type; int rel_bytes; - pr_err("The buggy address belongs to the object at %p\n" + pr_err("The buggy address belongs to the object at %px\n" " which belongs to the cache %s of size %d\n", object, cache->name, cache->object_size); @@ -225,7 +225,7 @@ static void describe_object_addr(struct kmem_cache *cache, void *object, } pr_err("The buggy address is located %d bytes %s of\n" - " %d-byte region [%p, %p)\n", + " %d-byte region [%px, %px)\n", rel_bytes, rel_type, cache->object_size, (void *)object_addr, (void *)(object_addr + cache->object_size)); } @@ -302,7 +302,7 @@ static void print_shadow_for_address(const void *addr) char shadow_buf[SHADOW_BYTES_PER_ROW]; snprintf(buffer, sizeof(buffer), - (i == 0) ? ">%p: " : " %p: ", kaddr); + (i == 0) ? ">%px: " : " %px: ", kaddr); /* * We should not pass a shadow pointer to generic * function, because generic functions may try to diff --git a/mm/kmemcheck.c b/mm/kmemcheck.c deleted file mode 100644 index cec5940..0000000 --- a/mm/kmemcheck.c +++ /dev/null @@ -1 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 diff --git a/mm/kmemleak.c b/mm/kmemleak.c index e4738d5..f656ca2 100644 --- a/mm/kmemleak.c +++ b/mm/kmemleak.c @@ -127,7 +127,7 @@ /* GFP bitmask for kmemleak internal allocations */ #define gfp_kmemleak_mask(gfp) (((gfp) & (GFP_KERNEL | GFP_ATOMIC)) | \ __GFP_NORETRY | __GFP_NOMEMALLOC | \ - __GFP_NOWARN) + __GFP_NOWARN | __GFP_NOFAIL) /* scanning area inside a memory block */ struct kmemleak_scan_area { @@ -1523,6 +1523,8 @@ static void kmemleak_scan(void) if (page_count(page) == 0) continue; scan_block(page, page + 1, NULL); + if (!(pfn & 63)) + cond_resched(); } } put_online_mems(); @@ -675,15 +675,8 @@ static struct page *get_ksm_page(struct stable_node *stable_node, bool lock_it) expected_mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM); again: - kpfn = READ_ONCE(stable_node->kpfn); + kpfn = READ_ONCE(stable_node->kpfn); /* Address dependency. */ page = pfn_to_page(kpfn); - - /* - * page is computed from kpfn, so on most architectures reading - * page->mapping is naturally ordered after reading node->kpfn, - * but on Alpha we need to be more careful. - */ - smp_read_barrier_depends(); if (READ_ONCE(page->mapping) != expected_mapping) goto stale; diff --git a/mm/madvise.c b/mm/madvise.c index 375cf32..4d3c922 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -276,15 +276,14 @@ static long madvise_willneed(struct vm_area_struct *vma, { struct file *file = vma->vm_file; + *prev = vma; #ifdef CONFIG_SWAP if (!file) { - *prev = vma; force_swapin_readahead(vma, start, end); return 0; } if (shmem_mapping(file->f_mapping)) { - *prev = vma; force_shm_swapin_readahead(vma, start, end, file->f_mapping); return 0; @@ -299,7 +298,6 @@ static long madvise_willneed(struct vm_area_struct *vma, return 0; } - *prev = vma; start = ((start - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; if (end > vma->vm_end) end = vma->vm_end; @@ -663,7 +661,7 @@ static int madvise_inject_error(int behavior, pr_info("Injecting memory failure for pfn %#lx at process virtual address %#lx\n", page_to_pfn(page), start); - ret = memory_failure(page_to_pfn(page), 0, MF_COUNT_INCREASED); + ret = memory_failure(page_to_pfn(page), MF_COUNT_INCREASED); if (ret) return ret; } diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 50e6906..9011997 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3777,7 +3777,7 @@ static int memcg_event_wake(wait_queue_entry_t *wait, unsigned mode, struct mem_cgroup_event *event = container_of(wait, struct mem_cgroup_event, wait); struct mem_cgroup *memcg = event->memcg; - unsigned long flags = (unsigned long)key; + __poll_t flags = key_to_poll(key); if (flags & POLLHUP) { /* @@ -6044,7 +6044,7 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry) memcg_check_events(memcg, page); if (!mem_cgroup_is_root(memcg)) - css_put(&memcg->css); + css_put_many(&memcg->css, nr_entries); } /** diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 4acdf39..4b80cce 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -178,25 +178,19 @@ EXPORT_SYMBOL_GPL(hwpoison_filter); * ``action optional'' if they are not immediately affected by the error * ``action required'' if error happened in current execution context */ -static int kill_proc(struct task_struct *t, unsigned long addr, int trapno, +static int kill_proc(struct task_struct *t, unsigned long addr, unsigned long pfn, struct page *page, int flags) { - struct siginfo si; + short addr_lsb; int ret; pr_err("Memory failure: %#lx: Killing %s:%d due to hardware memory corruption\n", pfn, t->comm, t->pid); - si.si_signo = SIGBUS; - si.si_errno = 0; - si.si_addr = (void *)addr; -#ifdef __ARCH_SI_TRAPNO - si.si_trapno = trapno; -#endif - si.si_addr_lsb = compound_order(compound_head(page)) + PAGE_SHIFT; + addr_lsb = compound_order(compound_head(page)) + PAGE_SHIFT; if ((flags & MF_ACTION_REQUIRED) && t->mm == current->mm) { - si.si_code = BUS_MCEERR_AR; - ret = force_sig_info(SIGBUS, &si, current); + ret = force_sig_mceerr(BUS_MCEERR_AR, (void __user *)addr, + addr_lsb, current); } else { /* * Don't use force here, it's convenient if the signal @@ -204,8 +198,8 @@ static int kill_proc(struct task_struct *t, unsigned long addr, int trapno, * This could cause a loop when the user sets SIGBUS * to SIG_IGN, but hopefully no one will do that? */ - si.si_code = BUS_MCEERR_AO; - ret = send_sig_info(SIGBUS, &si, t); /* synchronous? */ + ret = send_sig_mceerr(BUS_MCEERR_AO, (void __user *)addr, + addr_lsb, t); /* synchronous? */ } if (ret < 0) pr_info("Memory failure: Error sending signal to %s:%d: %d\n", @@ -323,7 +317,7 @@ static void add_to_kill(struct task_struct *tsk, struct page *p, * Also when FAIL is set do a force kill because something went * wrong earlier. */ -static void kill_procs(struct list_head *to_kill, int forcekill, int trapno, +static void kill_procs(struct list_head *to_kill, int forcekill, bool fail, struct page *page, unsigned long pfn, int flags) { @@ -348,7 +342,7 @@ static void kill_procs(struct list_head *to_kill, int forcekill, int trapno, * check for that, but we need to tell the * process anyways. */ - else if (kill_proc(tk->tsk, tk->addr, trapno, + else if (kill_proc(tk->tsk, tk->addr, pfn, page, flags) < 0) pr_err("Memory failure: %#lx: Cannot send advisory machine check signal to %s:%d\n", pfn, tk->tsk->comm, tk->tsk->pid); @@ -927,7 +921,7 @@ EXPORT_SYMBOL_GPL(get_hwpoison_page); * the pages and send SIGBUS to the processes if the data was dirty. */ static bool hwpoison_user_mappings(struct page *p, unsigned long pfn, - int trapno, int flags, struct page **hpagep) + int flags, struct page **hpagep) { enum ttu_flags ttu = TTU_IGNORE_MLOCK | TTU_IGNORE_ACCESS; struct address_space *mapping; @@ -1017,7 +1011,7 @@ static bool hwpoison_user_mappings(struct page *p, unsigned long pfn, * any accesses to the poisoned memory. */ forcekill = PageDirty(hpage) || (flags & MF_MUST_KILL); - kill_procs(&tokill, forcekill, trapno, !unmap_success, p, pfn, flags); + kill_procs(&tokill, forcekill, !unmap_success, p, pfn, flags); return unmap_success; } @@ -1045,7 +1039,7 @@ static int identify_page_state(unsigned long pfn, struct page *p, return page_action(ps, p, pfn); } -static int memory_failure_hugetlb(unsigned long pfn, int trapno, int flags) +static int memory_failure_hugetlb(unsigned long pfn, int flags) { struct page *p = pfn_to_page(pfn); struct page *head = compound_head(p); @@ -1090,7 +1084,7 @@ static int memory_failure_hugetlb(unsigned long pfn, int trapno, int flags) return 0; } - if (!hwpoison_user_mappings(p, pfn, trapno, flags, &head)) { + if (!hwpoison_user_mappings(p, pfn, flags, &head)) { action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED); res = -EBUSY; goto out; @@ -1105,7 +1099,6 @@ out: /** * memory_failure - Handle memory failure of a page. * @pfn: Page Number of the corrupted page - * @trapno: Trap number reported in the signal to user space. * @flags: fine tune action taken * * This function is called by the low level machine check code @@ -1120,7 +1113,7 @@ out: * Must run in process context (e.g. a work queue) with interrupts * enabled and no spinlocks hold. */ -int memory_failure(unsigned long pfn, int trapno, int flags) +int memory_failure(unsigned long pfn, int flags) { struct page *p; struct page *hpage; @@ -1129,7 +1122,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags) unsigned long page_flags; if (!sysctl_memory_failure_recovery) - panic("Memory failure from trap %d on page %lx", trapno, pfn); + panic("Memory failure on page %lx", pfn); if (!pfn_valid(pfn)) { pr_err("Memory failure: %#lx: memory outside kernel control\n", @@ -1139,7 +1132,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags) p = pfn_to_page(pfn); if (PageHuge(p)) - return memory_failure_hugetlb(pfn, trapno, flags); + return memory_failure_hugetlb(pfn, flags); if (TestSetPageHWPoison(p)) { pr_err("Memory failure: %#lx: already hardware poisoned\n", pfn); @@ -1268,7 +1261,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags) * When the raw error page is thp tail page, hpage points to the raw * page after thp split. */ - if (!hwpoison_user_mappings(p, pfn, trapno, flags, &hpage)) { + if (!hwpoison_user_mappings(p, pfn, flags, &hpage)) { action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED); res = -EBUSY; goto out; @@ -1296,7 +1289,6 @@ EXPORT_SYMBOL_GPL(memory_failure); struct memory_failure_entry { unsigned long pfn; - int trapno; int flags; }; @@ -1312,7 +1304,6 @@ static DEFINE_PER_CPU(struct memory_failure_cpu, memory_failure_cpu); /** * memory_failure_queue - Schedule handling memory failure of a page. * @pfn: Page Number of the corrupted page - * @trapno: Trap number reported in the signal to user space. * @flags: Flags for memory failure handling * * This function is called by the low level hardware error handler @@ -1326,13 +1317,12 @@ static DEFINE_PER_CPU(struct memory_failure_cpu, memory_failure_cpu); * * Can run in IRQ context. */ -void memory_failure_queue(unsigned long pfn, int trapno, int flags) +void memory_failure_queue(unsigned long pfn, int flags) { struct memory_failure_cpu *mf_cpu; unsigned long proc_flags; struct memory_failure_entry entry = { .pfn = pfn, - .trapno = trapno, .flags = flags, }; @@ -1365,7 +1355,7 @@ static void memory_failure_work_func(struct work_struct *work) if (entry.flags & MF_SOFT_OFFLINE) soft_offline_page(pfn_to_page(entry.pfn), entry.flags); else - memory_failure(entry.pfn, entry.trapno, entry.flags); + memory_failure(entry.pfn, entry.flags); } } diff --git a/mm/memory.c b/mm/memory.c index 85e7a87..7930046 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2857,8 +2857,11 @@ int do_swap_page(struct vm_fault *vmf) int ret = 0; bool vma_readahead = swap_use_vma_readahead(); - if (vma_readahead) + if (vma_readahead) { page = swap_readahead_detect(vmf, &swap_ra); + swapcache = page; + } + if (!pte_unmap_same(vma->vm_mm, vmf->pmd, vmf->pte, vmf->orig_pte)) { if (page) put_page(page); @@ -2889,9 +2892,12 @@ int do_swap_page(struct vm_fault *vmf) delayacct_set_flag(DELAYACCT_PF_SWAPIN); - if (!page) + if (!page) { page = lookup_swap_cache(entry, vma_readahead ? vma : NULL, vmf->address); + swapcache = page; + } + if (!page) { struct swap_info_struct *si = swp_swap_info(entry); @@ -3831,7 +3837,8 @@ static inline int create_huge_pmd(struct vm_fault *vmf) return VM_FAULT_FALLBACK; } -static int wp_huge_pmd(struct vm_fault *vmf, pmd_t orig_pmd) +/* `inline' is required to avoid gcc 4.1.2 build error */ +static inline int wp_huge_pmd(struct vm_fault *vmf, pmd_t orig_pmd) { if (vma_is_anonymous(vmf->vma)) return do_huge_pmd_wp_page(vmf, orig_pmd); @@ -779,7 +779,7 @@ static int apply_mlockall_flags(int flags) /* Ignore errors */ mlock_fixup(vma, &prev, vma->vm_start, vma->vm_end, newflags); - cond_resched_rcu_qs(); + cond_resched(); } out: return 0; @@ -2555,9 +2555,11 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma, struct vm_area_struct *new; int err; - if (is_vm_hugetlb_page(vma) && (addr & - ~(huge_page_mask(hstate_vma(vma))))) - return -EINVAL; + if (vma->vm_ops && vma->vm_ops->split) { + err = vma->vm_ops->split(vma, addr); + if (err) + return err; + } new = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL); if (!new) @@ -3017,20 +3019,20 @@ void exit_mmap(struct mm_struct *mm) /* Use -1 here to ensure all VMAs in the mm are unmapped */ unmap_vmas(&tlb, vma, 0, -1); - set_bit(MMF_OOM_SKIP, &mm->flags); - if (unlikely(tsk_is_oom_victim(current))) { + if (unlikely(mm_is_oom_victim(mm))) { /* * Wait for oom_reap_task() to stop working on this * mm. Because MMF_OOM_SKIP is already set before * calling down_read(), oom_reap_task() will not run * on this "mm" post up_write(). * - * tsk_is_oom_victim() cannot be set from under us - * either because current->mm is already set to NULL + * mm_is_oom_victim() cannot be set from under us + * either because victim->mm is already set to NULL * under task_lock before calling mmput and oom_mm is - * set not NULL by the OOM killer only if current->mm + * set not NULL by the OOM killer only if victim->mm * is found not NULL while holding the task_lock. */ + set_bit(MMF_OOM_SKIP, &mm->flags); down_write(&mm->mmap_sem); up_write(&mm->mmap_sem); } diff --git a/mm/mprotect.c b/mm/mprotect.c index ec39f730..58b629b 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -166,7 +166,7 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, next = pmd_addr_end(addr, end); if (!is_swap_pmd(*pmd) && !pmd_trans_huge(*pmd) && !pmd_devmap(*pmd) && pmd_none_or_clear_bad(pmd)) - continue; + goto next; /* invoke the mmu notifier if the pmd is populated */ if (!mni_start) { @@ -188,7 +188,7 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, } /* huge pmd was handled */ - continue; + goto next; } } /* fall through, the trans huge pmd just split */ @@ -196,6 +196,8 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, this_pages = change_pte_range(vma, pmd, addr, next, newprot, dirty_accountable, prot_numa); pages += this_pages; +next: + cond_resched(); } while (pmd++, addr = next, addr != end); if (mni_start) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index c86fbd1..29f8555 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -550,7 +550,6 @@ static bool __oom_reap_task_mm(struct task_struct *tsk, struct mm_struct *mm) */ set_bit(MMF_UNSTABLE, &mm->flags); - tlb_gather_mmu(&tlb, mm, 0, -1); for (vma = mm->mmap ; vma; vma = vma->vm_next) { if (!can_madv_dontneed_vma(vma)) continue; @@ -565,11 +564,13 @@ static bool __oom_reap_task_mm(struct task_struct *tsk, struct mm_struct *mm) * we do not want to block exit_mmap by keeping mm ref * count elevated without a good reason. */ - if (vma_is_anonymous(vma) || !(vma->vm_flags & VM_SHARED)) + if (vma_is_anonymous(vma) || !(vma->vm_flags & VM_SHARED)) { + tlb_gather_mmu(&tlb, mm, vma->vm_start, vma->vm_end); unmap_page_range(&tlb, vma, vma->vm_start, vma->vm_end, NULL); + tlb_finish_mmu(&tlb, vma->vm_start, vma->vm_end); + } } - tlb_finish_mmu(&tlb, 0, -1); pr_info("oom_reaper: reaped process %d (%s), now anon-rss:%lukB, file-rss:%lukB, shmem-rss:%lukB\n", task_pid_nr(tsk), tsk->comm, K(get_mm_counter(mm, MM_ANONPAGES)), @@ -682,8 +683,10 @@ static void mark_oom_victim(struct task_struct *tsk) return; /* oom_mm is bound to the signal struct life time. */ - if (!cmpxchg(&tsk->signal->oom_mm, NULL, mm)) + if (!cmpxchg(&tsk->signal->oom_mm, NULL, mm)) { mmgrab(tsk->signal->oom_mm); + set_bit(MMF_OOM_VICTIM, &mm->flags); + } /* * Make sure that the task is woken up from uninterruptible sleep diff --git a/mm/page-writeback.c b/mm/page-writeback.c index e709503..586f312 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -433,11 +433,8 @@ static void domain_dirty_limits(struct dirty_throttle_control *dtc) else bg_thresh = (bg_ratio * available_memory) / PAGE_SIZE; - if (unlikely(bg_thresh >= thresh)) { - pr_warn("vm direct limit must be set greater than background limit.\n"); + if (bg_thresh >= thresh) bg_thresh = thresh / 2; - } - tsk = current; if (tsk->flags & PF_LESS_THROTTLE || rt_task(tsk)) { bg_thresh += bg_thresh / 4 + global_wb_domain.dirty_limit / 32; diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d4096f4..76c9688 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2507,10 +2507,6 @@ void drain_all_pages(struct zone *zone) if (WARN_ON_ONCE(!mm_percpu_wq)) return; - /* Workqueues cannot recurse */ - if (current->flags & PF_WQ_WORKER) - return; - /* * Do not drain if one is already in progress unless it's specific to * a zone. Such callers are primarily CMA and memory hotplug and need @@ -2688,6 +2684,7 @@ void free_unref_page_list(struct list_head *list) { struct page *page, *next; unsigned long flags, pfn; + int batch_count = 0; /* Prepare pages for freeing */ list_for_each_entry_safe(page, next, list, lru) { @@ -2704,6 +2701,16 @@ void free_unref_page_list(struct list_head *list) set_page_private(page, 0); trace_mm_page_free_batched(page); free_unref_page_commit(page, pfn); + + /* + * Guard against excessive IRQ disabled times when we get + * a large list of pages to free. + */ + if (++batch_count == SWAP_CLUSTER_MAX) { + local_irq_restore(flags); + batch_count = 0; + local_irq_save(flags); + } } local_irq_restore(flags); } @@ -6253,6 +6260,8 @@ void __paginginit zero_resv_unavail(void) pgcnt = 0; for_each_resv_unavail_range(i, &start, &end) { for (pfn = PFN_DOWN(start); pfn < PFN_UP(end); pfn++) { + if (!pfn_valid(ALIGN_DOWN(pfn, pageblock_nr_pages))) + continue; mm_zero_struct_page(pfn_to_page(pfn)); pgcnt++; } @@ -7656,11 +7665,18 @@ int alloc_contig_range(unsigned long start, unsigned long end, /* * In case of -EBUSY, we'd like to know which page causes problem. - * So, just fall through. We will check it in test_pages_isolated(). + * So, just fall through. test_pages_isolated() has a tracepoint + * which will report the busy page. + * + * It is possible that busy pages could become available before + * the call to test_pages_isolated, and the range will actually be + * allocated. So, if we fall through be sure to clear ret so that + * -EBUSY is not accidentally used or returned to caller. */ ret = __alloc_contig_migrate_range(&cc, start, end); if (ret && ret != -EBUSY) goto done; + ret =0; /* * Pages from [start, end) are within a MAX_ORDER_NR_PAGES diff --git a/mm/page_io.c b/mm/page_io.c index e93f1a4..b41cf96 100644 --- a/mm/page_io.c +++ b/mm/page_io.c @@ -50,7 +50,7 @@ static struct bio *get_swap_bio(gfp_t gfp_flags, void end_swap_bio_write(struct bio *bio) { - struct page *page = bio->bi_io_vec[0].bv_page; + struct page *page = bio_first_page_all(bio); if (bio->bi_status) { SetPageError(page); @@ -122,7 +122,7 @@ static void swap_slot_free_notify(struct page *page) static void end_swap_bio_read(struct bio *bio) { - struct page *page = bio->bi_io_vec[0].bv_page; + struct page *page = bio_first_page_all(bio); struct task_struct *waiter = bio->bi_private; if (bio->bi_status) { diff --git a/mm/page_owner.c b/mm/page_owner.c index 8592543..270a821 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -616,7 +616,6 @@ static void init_early_allocated_pages(void) { pg_data_t *pgdat; - drain_all_pages(NULL); for_each_online_pgdat(pgdat) init_zones_in_node(pgdat); } diff --git a/mm/page_vma_mapped.c b/mm/page_vma_mapped.c index d22b843..ae3c2a3 100644 --- a/mm/page_vma_mapped.c +++ b/mm/page_vma_mapped.c @@ -30,10 +30,37 @@ static bool map_pte(struct page_vma_mapped_walk *pvmw) return true; } +static inline bool pfn_in_hpage(struct page *hpage, unsigned long pfn) +{ + unsigned long hpage_pfn = page_to_pfn(hpage); + + /* THP can be referenced by any subpage */ + return pfn >= hpage_pfn && pfn - hpage_pfn < hpage_nr_pages(hpage); +} + +/** + * check_pte - check if @pvmw->page is mapped at the @pvmw->pte + * + * page_vma_mapped_walk() found a place where @pvmw->page is *potentially* + * mapped. check_pte() has to validate this. + * + * @pvmw->pte may point to empty PTE, swap PTE or PTE pointing to arbitrary + * page. + * + * If PVMW_MIGRATION flag is set, returns true if @pvmw->pte contains migration + * entry that points to @pvmw->page or any subpage in case of THP. + * + * If PVMW_MIGRATION flag is not set, returns true if @pvmw->pte points to + * @pvmw->page or any subpage in case of THP. + * + * Otherwise, return false. + * + */ static bool check_pte(struct page_vma_mapped_walk *pvmw) { + unsigned long pfn; + if (pvmw->flags & PVMW_MIGRATION) { -#ifdef CONFIG_MIGRATION swp_entry_t entry; if (!is_swap_pte(*pvmw->pte)) return false; @@ -41,38 +68,25 @@ static bool check_pte(struct page_vma_mapped_walk *pvmw) if (!is_migration_entry(entry)) return false; - if (migration_entry_to_page(entry) - pvmw->page >= - hpage_nr_pages(pvmw->page)) { - return false; - } - if (migration_entry_to_page(entry) < pvmw->page) - return false; -#else - WARN_ON_ONCE(1); -#endif - } else { - if (is_swap_pte(*pvmw->pte)) { - swp_entry_t entry; - entry = pte_to_swp_entry(*pvmw->pte); - if (is_device_private_entry(entry) && - device_private_entry_to_page(entry) == pvmw->page) - return true; - } + pfn = migration_entry_to_pfn(entry); + } else if (is_swap_pte(*pvmw->pte)) { + swp_entry_t entry; - if (!pte_present(*pvmw->pte)) + /* Handle un-addressable ZONE_DEVICE memory */ + entry = pte_to_swp_entry(*pvmw->pte); + if (!is_device_private_entry(entry)) return false; - /* THP can be referenced by any subpage */ - if (pte_page(*pvmw->pte) - pvmw->page >= - hpage_nr_pages(pvmw->page)) { - return false; - } - if (pte_page(*pvmw->pte) < pvmw->page) + pfn = device_private_entry_to_pfn(entry); + } else { + if (!pte_present(*pvmw->pte)) return false; + + pfn = pte_pfn(*pvmw->pte); } - return true; + return pfn_in_hpage(pvmw->page, pfn); } /** diff --git a/mm/percpu.c b/mm/percpu.c index 79e3549..50e7fdf 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -2719,7 +2719,11 @@ void __init setup_per_cpu_areas(void) if (pcpu_setup_first_chunk(ai, fc) < 0) panic("Failed to initialize percpu areas."); +#ifdef CONFIG_CRIS +#warning "the CRIS architecture has physical and virtual addresses confused" +#else pcpu_free_alloc_info(ai); +#endif } #endif /* CONFIG_SMP */ @@ -3776,7 +3776,7 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent) * tmpfs instance, limiting inodes to one per page of lowmem; * but the internal instance is left unlimited. */ - if (!(sb->s_flags & MS_KERNMOUNT)) { + if (!(sb->s_flags & SB_KERNMOUNT)) { sbinfo->max_blocks = shmem_default_max_blocks(); sbinfo->max_inodes = shmem_default_max_inodes(); if (shmem_parse_options(data, sbinfo, false)) { @@ -3784,12 +3784,12 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent) goto failed; } } else { - sb->s_flags |= MS_NOUSER; + sb->s_flags |= SB_NOUSER; } sb->s_export_op = &shmem_export_ops; - sb->s_flags |= MS_NOSEC; + sb->s_flags |= SB_NOSEC; #else - sb->s_flags |= MS_NOUSER; + sb->s_flags |= SB_NOUSER; #endif spin_lock_init(&sbinfo->stat_lock); @@ -3809,7 +3809,7 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent) sb->s_xattr = shmem_xattr_handlers; #endif #ifdef CONFIG_TMPFS_POSIX_ACL - sb->s_flags |= MS_POSIXACL; + sb->s_flags |= SB_POSIXACL; #endif uuid_gen(&sb->s_uuid); @@ -1584,11 +1584,8 @@ static void print_objinfo(struct kmem_cache *cachep, void *objp, int lines) *dbg_redzone2(cachep, objp)); } - if (cachep->flags & SLAB_STORE_USER) { - pr_err("Last user: [<%p>](%pSR)\n", - *dbg_userword(cachep, objp), - *dbg_userword(cachep, objp)); - } + if (cachep->flags & SLAB_STORE_USER) + pr_err("Last user: (%pSR)\n", *dbg_userword(cachep, objp)); realobj = (char *)objp + obj_offset(cachep); size = cachep->object_size; for (i = 0; i < size && lines; i += 16, lines--) { @@ -1621,7 +1618,7 @@ static void check_poison_obj(struct kmem_cache *cachep, void *objp) /* Mismatch ! */ /* Print header */ if (lines == 0) { - pr_err("Slab corruption (%s): %s start=%p, len=%d\n", + pr_err("Slab corruption (%s): %s start=%px, len=%d\n", print_tainted(), cachep->name, realobj, size); print_objinfo(cachep, objp, 0); @@ -1650,13 +1647,13 @@ static void check_poison_obj(struct kmem_cache *cachep, void *objp) if (objnr) { objp = index_to_obj(cachep, page, objnr - 1); realobj = (char *)objp + obj_offset(cachep); - pr_err("Prev obj: start=%p, len=%d\n", realobj, size); + pr_err("Prev obj: start=%px, len=%d\n", realobj, size); print_objinfo(cachep, objp, 2); } if (objnr + 1 < cachep->num) { objp = index_to_obj(cachep, page, objnr + 1); realobj = (char *)objp + obj_offset(cachep); - pr_err("Next obj: start=%p, len=%d\n", realobj, size); + pr_err("Next obj: start=%px, len=%d\n", realobj, size); print_objinfo(cachep, objp, 2); } } @@ -2608,7 +2605,7 @@ static void slab_put_obj(struct kmem_cache *cachep, /* Verify double free bug */ for (i = page->active; i < cachep->num; i++) { if (get_free_obj(page, i) == objnr) { - pr_err("slab: double free detected in cache '%s', objp %p\n", + pr_err("slab: double free detected in cache '%s', objp %px\n", cachep->name, objp); BUG(); } @@ -2772,7 +2769,7 @@ static inline void verify_redzone_free(struct kmem_cache *cache, void *obj) else slab_error(cache, "memory outside object was overwritten"); - pr_err("%p: redzone 1:0x%llx, redzone 2:0x%llx\n", + pr_err("%px: redzone 1:0x%llx, redzone 2:0x%llx\n", obj, redzone1, redzone2); } @@ -3078,7 +3075,7 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep, if (*dbg_redzone1(cachep, objp) != RED_INACTIVE || *dbg_redzone2(cachep, objp) != RED_INACTIVE) { slab_error(cachep, "double free, or memory outside object was overwritten"); - pr_err("%p: redzone 1:0x%llx, redzone 2:0x%llx\n", + pr_err("%px: redzone 1:0x%llx, redzone 2:0x%llx\n", objp, *dbg_redzone1(cachep, objp), *dbg_redzone2(cachep, objp)); } @@ -3091,7 +3088,7 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep, cachep->ctor(objp); if (ARCH_SLAB_MINALIGN && ((unsigned long)objp & (ARCH_SLAB_MINALIGN-1))) { - pr_err("0x%p: not aligned to ARCH_SLAB_MINALIGN=%d\n", + pr_err("0x%px: not aligned to ARCH_SLAB_MINALIGN=%d\n", objp, (int)ARCH_SLAB_MINALIGN); } return objp; @@ -4283,7 +4280,7 @@ static void show_symbol(struct seq_file *m, unsigned long address) return; } #endif - seq_printf(m, "%p", (void *)address); + seq_printf(m, "%px", (void *)address); } static int leaks_show(struct seq_file *m, void *p) diff --git a/mm/sparse.c b/mm/sparse.c index 7a5daca..2609aba 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -211,7 +211,7 @@ void __init memory_present(int nid, unsigned long start, unsigned long end) if (unlikely(!mem_section)) { unsigned long size, align; - size = sizeof(struct mem_section) * NR_SECTION_ROOTS; + size = sizeof(struct mem_section*) * NR_SECTION_ROOTS; align = 1 << (INTERNODE_CACHE_SHIFT); mem_section = memblock_virt_alloc(size, align); } diff --git a/mm/swapfile.c b/mm/swapfile.c index 3074b02..42fe565 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -2697,7 +2697,7 @@ out: } #ifdef CONFIG_PROC_FS -static unsigned swaps_poll(struct file *file, poll_table *wait) +static __poll_t swaps_poll(struct file *file, poll_table *wait) { struct seq_file *seq = file->private_data; diff --git a/mm/vmscan.c b/mm/vmscan.c index c02c850..47d5ced 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -297,10 +297,13 @@ EXPORT_SYMBOL(register_shrinker); */ void unregister_shrinker(struct shrinker *shrinker) { + if (!shrinker->nr_deferred) + return; down_write(&shrinker_rwsem); list_del(&shrinker->list); up_write(&shrinker_rwsem); kfree(shrinker->nr_deferred); + shrinker->nr_deferred = NULL; } EXPORT_SYMBOL(unregister_shrinker); diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 685049a..683c065 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -53,6 +53,7 @@ #include <linux/mount.h> #include <linux/migrate.h> #include <linux/pagemap.h> +#include <linux/fs.h> #define ZSPAGE_MAGIC 0x58 |
