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authorGerald Schaefer <gerald.schaefer@de.ibm.com>2013-04-29 15:07:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-29 15:54:33 -0700
commit106c992a5ebef28193cf5958e49ceff5e4aebb04 (patch)
tree86f6a69dce858449e9f02d43b65cd2c2743c57dd /mm
parent146732ce104ddfed3d4d82722c0b336074016b92 (diff)
downloadop-kernel-dev-106c992a5ebef28193cf5958e49ceff5e4aebb04.zip
op-kernel-dev-106c992a5ebef28193cf5958e49ceff5e4aebb04.tar.gz
mm/hugetlb: add more arch-defined huge_pte functions
Commit abf09bed3cce ("s390/mm: implement software dirty bits") introduced another difference in the pte layout vs. the pmd layout on s390, thoroughly breaking the s390 support for hugetlbfs. This requires replacing some more pte_xxx functions in mm/hugetlbfs.c with a huge_pte_xxx version. This patch introduces those huge_pte_xxx functions and their generic implementation in asm-generic/hugetlb.h, which will now be included on all architectures supporting hugetlbfs apart from s390. This change will be a no-op for those architectures. [akpm@linux-foundation.org: fix warning] Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Hugh Dickins <hughd@google.com> Cc: Hillf Danton <dhillf@gmail.com> Acked-by: Michal Hocko <mhocko@suse.cz> [for !s390 parts] Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/hugetlb.c24
1 files changed, 13 insertions, 11 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 1a12f5b..73b864a 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2247,10 +2247,11 @@ static pte_t make_huge_pte(struct vm_area_struct *vma, struct page *page,
pte_t entry;
if (writable) {
- entry =
- pte_mkwrite(pte_mkdirty(mk_pte(page, vma->vm_page_prot)));
+ entry = huge_pte_mkwrite(huge_pte_mkdirty(mk_huge_pte(page,
+ vma->vm_page_prot)));
} else {
- entry = huge_pte_wrprotect(mk_pte(page, vma->vm_page_prot));
+ entry = huge_pte_wrprotect(mk_huge_pte(page,
+ vma->vm_page_prot));
}
entry = pte_mkyoung(entry);
entry = pte_mkhuge(entry);
@@ -2264,7 +2265,7 @@ static void set_huge_ptep_writable(struct vm_area_struct *vma,
{
pte_t entry;
- entry = pte_mkwrite(pte_mkdirty(huge_ptep_get(ptep)));
+ entry = huge_pte_mkwrite(huge_pte_mkdirty(huge_ptep_get(ptep)));
if (huge_ptep_set_access_flags(vma, address, ptep, entry, 1))
update_mmu_cache(vma, address, ptep);
}
@@ -2379,7 +2380,7 @@ again:
* HWPoisoned hugepage is already unmapped and dropped reference
*/
if (unlikely(is_hugetlb_entry_hwpoisoned(pte))) {
- pte_clear(mm, address, ptep);
+ huge_pte_clear(mm, address, ptep);
continue;
}
@@ -2403,7 +2404,7 @@ again:
pte = huge_ptep_get_and_clear(mm, address, ptep);
tlb_remove_tlb_entry(tlb, ptep, address);
- if (pte_dirty(pte))
+ if (huge_pte_dirty(pte))
set_page_dirty(page);
page_remove_rmap(page);
@@ -2856,7 +2857,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
* page now as it is used to determine if a reservation has been
* consumed.
*/
- if ((flags & FAULT_FLAG_WRITE) && !pte_write(entry)) {
+ if ((flags & FAULT_FLAG_WRITE) && !huge_pte_write(entry)) {
if (vma_needs_reservation(h, vma, address) < 0) {
ret = VM_FAULT_OOM;
goto out_mutex;
@@ -2886,12 +2887,12 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
if (flags & FAULT_FLAG_WRITE) {
- if (!pte_write(entry)) {
+ if (!huge_pte_write(entry)) {
ret = hugetlb_cow(mm, vma, address, ptep, entry,
pagecache_page);
goto out_page_table_lock;
}
- entry = pte_mkdirty(entry);
+ entry = huge_pte_mkdirty(entry);
}
entry = pte_mkyoung(entry);
if (huge_ptep_set_access_flags(vma, address, ptep, entry,
@@ -2972,7 +2973,8 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma,
* directly from any kind of swap entries.
*/
if (absent || is_swap_pte(huge_ptep_get(pte)) ||
- ((flags & FOLL_WRITE) && !pte_write(huge_ptep_get(pte)))) {
+ ((flags & FOLL_WRITE) &&
+ !huge_pte_write(huge_ptep_get(pte)))) {
int ret;
spin_unlock(&mm->page_table_lock);
@@ -3042,7 +3044,7 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
}
if (!huge_pte_none(huge_ptep_get(ptep))) {
pte = huge_ptep_get_and_clear(mm, address, ptep);
- pte = pte_mkhuge(pte_modify(pte, newprot));
+ pte = pte_mkhuge(huge_pte_modify(pte, newprot));
pte = arch_make_huge_pte(pte, vma, NULL, 0);
set_huge_pte_at(mm, address, ptep, pte);
pages++;
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