summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--Documentation/feature-removal-schedule.txt8
-rw-r--r--arch/arm/include/asm/kmap_types.h26
-rw-r--r--arch/avr32/include/asm/kmap_types.h24
-rw-r--r--arch/frv/include/asm/highmem.h34
-rw-r--r--arch/frv/include/asm/kmap_types.h24
-rw-r--r--arch/frv/mb93090-mb00/pci-dma.c4
-rw-r--r--arch/frv/mm/cache-page.c8
-rw-r--r--arch/frv/mm/highmem.c20
-rw-r--r--arch/powerpc/include/asm/kmap_types.h31
-rw-r--r--arch/tile/include/asm/kmap_types.h31
-rw-r--r--arch/tile/mm/highmem.c2
-rw-r--r--arch/um/include/asm/kmap_types.h18
-rw-r--r--fs/jbd2/commit.c4
-rw-r--r--fs/pipe.c2
-rw-r--r--include/asm-generic/kmap_types.h34
-rw-r--r--include/linux/highmem.h41
-rw-r--r--include/linux/pipe_fs_i.h8
-rw-r--r--mm/vmalloc.c8
18 files changed, 44 insertions, 283 deletions
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 61d1a89..76112da 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -512,14 +512,6 @@ Who: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
----------------------------
-What: kmap_atomic(page, km_type)
-When: 3.5
-Why: The old kmap_atomic() with two arguments is deprecated, we only
- keep it for backward compatibility for few cycles and then drop it.
-Who: Cong Wang <amwang@redhat.com>
-
-----------------------------
-
What: get_robust_list syscall
When: 2013
Why: There appear to be no production users of the get_robust_list syscall,
diff --git a/arch/arm/include/asm/kmap_types.h b/arch/arm/include/asm/kmap_types.h
index e51b1e8..83eb2f7 100644
--- a/arch/arm/include/asm/kmap_types.h
+++ b/arch/arm/include/asm/kmap_types.h
@@ -4,30 +4,6 @@
/*
* This is the "bare minimum". AIO seems to require this.
*/
-enum km_type {
- KM_BOUNCE_READ,
- KM_SKB_SUNRPC_DATA,
- KM_SKB_DATA_SOFTIRQ,
- KM_USER0,
- KM_USER1,
- KM_BIO_SRC_IRQ,
- KM_BIO_DST_IRQ,
- KM_PTE0,
- KM_PTE1,
- KM_IRQ0,
- KM_IRQ1,
- KM_SOFTIRQ0,
- KM_SOFTIRQ1,
- KM_L1_CACHE,
- KM_L2_CACHE,
- KM_KDB,
- KM_TYPE_NR
-};
-
-#ifdef CONFIG_DEBUG_HIGHMEM
-#define KM_NMI (-1)
-#define KM_NMI_PTE (-1)
-#define KM_IRQ_PTE (-1)
-#endif
+#define KM_TYPE_NR 16
#endif
diff --git a/arch/avr32/include/asm/kmap_types.h b/arch/avr32/include/asm/kmap_types.h
index b7f5c68..479330b 100644
--- a/arch/avr32/include/asm/kmap_types.h
+++ b/arch/avr32/include/asm/kmap_types.h
@@ -2,29 +2,9 @@
#define __ASM_AVR32_KMAP_TYPES_H
#ifdef CONFIG_DEBUG_HIGHMEM
-# define D(n) __KM_FENCE_##n ,
+# define KM_TYPE_NR 29
#else
-# define D(n)
+# define KM_TYPE_NR 14
#endif
-enum km_type {
-D(0) KM_BOUNCE_READ,
-D(1) KM_SKB_SUNRPC_DATA,
-D(2) KM_SKB_DATA_SOFTIRQ,
-D(3) KM_USER0,
-D(4) KM_USER1,
-D(5) KM_BIO_SRC_IRQ,
-D(6) KM_BIO_DST_IRQ,
-D(7) KM_PTE0,
-D(8) KM_PTE1,
-D(9) KM_PTE2,
-D(10) KM_IRQ0,
-D(11) KM_IRQ1,
-D(12) KM_SOFTIRQ0,
-D(13) KM_SOFTIRQ1,
-D(14) KM_TYPE_NR
-};
-
-#undef D
-
#endif /* __ASM_AVR32_KMAP_TYPES_H */
diff --git a/arch/frv/include/asm/highmem.h b/arch/frv/include/asm/highmem.h
index 716956a..b3adc93 100644
--- a/arch/frv/include/asm/highmem.h
+++ b/arch/frv/include/asm/highmem.h
@@ -76,15 +76,16 @@ extern struct page *kmap_atomic_to_page(void *ptr);
#ifndef __ASSEMBLY__
-#define __kmap_atomic_primary(type, paddr, ampr) \
+#define __kmap_atomic_primary(cached, paddr, ampr) \
({ \
unsigned long damlr, dampr; \
\
dampr = paddr | xAMPRx_L | xAMPRx_M | xAMPRx_S | xAMPRx_SS_16Kb | xAMPRx_V; \
\
- if (type != __KM_CACHE) \
+ if (!cached) \
asm volatile("movgs %0,dampr"#ampr :: "r"(dampr) : "memory"); \
else \
+ /* cache flush page attachment point */ \
asm volatile("movgs %0,iampr"#ampr"\n" \
"movgs %0,dampr"#ampr"\n" \
:: "r"(dampr) : "memory" \
@@ -112,29 +113,20 @@ extern struct page *kmap_atomic_to_page(void *ptr);
(void *) damlr; \
})
-static inline void *kmap_atomic_primary(struct page *page, enum km_type type)
+static inline void *kmap_atomic_primary(struct page *page)
{
unsigned long paddr;
pagefault_disable();
paddr = page_to_phys(page);
- switch (type) {
- case 0: return __kmap_atomic_primary(0, paddr, 2);
- case 1: return __kmap_atomic_primary(1, paddr, 3);
- case 2: return __kmap_atomic_primary(2, paddr, 4);
- case 3: return __kmap_atomic_primary(3, paddr, 5);
-
- default:
- BUG();
- return NULL;
- }
+ return __kmap_atomic_primary(1, paddr, 2);
}
-#define __kunmap_atomic_primary(type, ampr) \
+#define __kunmap_atomic_primary(cached, ampr) \
do { \
asm volatile("movgs gr0,dampr"#ampr"\n" ::: "memory"); \
- if (type == __KM_CACHE) \
+ if (cached) \
asm volatile("movgs gr0,iampr"#ampr"\n" ::: "memory"); \
} while(0)
@@ -143,17 +135,9 @@ do { \
asm volatile("tlbpr %0,gr0,#4,#1" : : "r"(vaddr) : "memory"); \
} while(0)
-static inline void kunmap_atomic_primary(void *kvaddr, enum km_type type)
+static inline void kunmap_atomic_primary(void *kvaddr)
{
- switch (type) {
- case 0: __kunmap_atomic_primary(0, 2); break;
- case 1: __kunmap_atomic_primary(1, 3); break;
- case 2: __kunmap_atomic_primary(2, 4); break;
- case 3: __kunmap_atomic_primary(3, 5); break;
-
- default:
- BUG();
- }
+ __kunmap_atomic_primary(1, 2);
pagefault_enable();
}
diff --git a/arch/frv/include/asm/kmap_types.h b/arch/frv/include/asm/kmap_types.h
index f8e16b2..43901f2 100644
--- a/arch/frv/include/asm/kmap_types.h
+++ b/arch/frv/include/asm/kmap_types.h
@@ -2,28 +2,6 @@
#ifndef _ASM_KMAP_TYPES_H
#define _ASM_KMAP_TYPES_H
-enum km_type {
- /* arch specific kmaps - change the numbers attached to these at your peril */
- __KM_CACHE, /* cache flush page attachment point */
- __KM_PGD, /* current page directory */
- __KM_ITLB_PTD, /* current instruction TLB miss page table lookup */
- __KM_DTLB_PTD, /* current data TLB miss page table lookup */
-
- /* general kmaps */
- KM_BOUNCE_READ,
- KM_SKB_SUNRPC_DATA,
- KM_SKB_DATA_SOFTIRQ,
- KM_USER0,
- KM_USER1,
- KM_BIO_SRC_IRQ,
- KM_BIO_DST_IRQ,
- KM_PTE0,
- KM_PTE1,
- KM_IRQ0,
- KM_IRQ1,
- KM_SOFTIRQ0,
- KM_SOFTIRQ1,
- KM_TYPE_NR
-};
+#define KM_TYPE_NR 17
#endif
diff --git a/arch/frv/mb93090-mb00/pci-dma.c b/arch/frv/mb93090-mb00/pci-dma.c
index 4f8d8bc..8247897 100644
--- a/arch/frv/mb93090-mb00/pci-dma.c
+++ b/arch/frv/mb93090-mb00/pci-dma.c
@@ -62,14 +62,14 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
dampr2 = __get_DAMPR(2);
for (i = 0; i < nents; i++) {
- vaddr = kmap_atomic_primary(sg_page(&sg[i]), __KM_CACHE);
+ vaddr = kmap_atomic_primary(sg_page(&sg[i]));
frv_dcache_writeback((unsigned long) vaddr,
(unsigned long) vaddr + PAGE_SIZE);
}
- kunmap_atomic_primary(vaddr, __KM_CACHE);
+ kunmap_atomic_primary(vaddr);
if (dampr2) {
__set_DAMPR(2, dampr2);
__set_IAMPR(2, dampr2);
diff --git a/arch/frv/mm/cache-page.c b/arch/frv/mm/cache-page.c
index b24ade2..8e09dae 100644
--- a/arch/frv/mm/cache-page.c
+++ b/arch/frv/mm/cache-page.c
@@ -26,11 +26,11 @@ void flush_dcache_page(struct page *page)
dampr2 = __get_DAMPR(2);
- vaddr = kmap_atomic_primary(page, __KM_CACHE);
+ vaddr = kmap_atomic_primary(page);
frv_dcache_writeback((unsigned long) vaddr, (unsigned long) vaddr + PAGE_SIZE);
- kunmap_atomic_primary(vaddr, __KM_CACHE);
+ kunmap_atomic_primary(vaddr);
if (dampr2) {
__set_DAMPR(2, dampr2);
@@ -54,12 +54,12 @@ void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
dampr2 = __get_DAMPR(2);
- vaddr = kmap_atomic_primary(page, __KM_CACHE);
+ vaddr = kmap_atomic_primary(page);
start = (start & ~PAGE_MASK) | (unsigned long) vaddr;
frv_cache_wback_inv(start, start + len);
- kunmap_atomic_primary(vaddr, __KM_CACHE);
+ kunmap_atomic_primary(vaddr);
if (dampr2) {
__set_DAMPR(2, dampr2);
diff --git a/arch/frv/mm/highmem.c b/arch/frv/mm/highmem.c
index 31902c9..bed9a9b 100644
--- a/arch/frv/mm/highmem.c
+++ b/arch/frv/mm/highmem.c
@@ -50,11 +50,11 @@ void *kmap_atomic(struct page *page)
/*
* The first 4 primary maps are reserved for architecture code
*/
- case 0: return __kmap_atomic_primary(4, paddr, 6);
- case 1: return __kmap_atomic_primary(5, paddr, 7);
- case 2: return __kmap_atomic_primary(6, paddr, 8);
- case 3: return __kmap_atomic_primary(7, paddr, 9);
- case 4: return __kmap_atomic_primary(8, paddr, 10);
+ case 0: return __kmap_atomic_primary(0, paddr, 6);
+ case 1: return __kmap_atomic_primary(0, paddr, 7);
+ case 2: return __kmap_atomic_primary(0, paddr, 8);
+ case 3: return __kmap_atomic_primary(0, paddr, 9);
+ case 4: return __kmap_atomic_primary(0, paddr, 10);
case 5 ... 5 + NR_TLB_LINES - 1:
return __kmap_atomic_secondary(type - 5, paddr);
@@ -70,11 +70,11 @@ void __kunmap_atomic(void *kvaddr)
{
int type = kmap_atomic_idx();
switch (type) {
- case 0: __kunmap_atomic_primary(4, 6); break;
- case 1: __kunmap_atomic_primary(5, 7); break;
- case 2: __kunmap_atomic_primary(6, 8); break;
- case 3: __kunmap_atomic_primary(7, 9); break;
- case 4: __kunmap_atomic_primary(8, 10); break;
+ case 0: __kunmap_atomic_primary(0, 6); break;
+ case 1: __kunmap_atomic_primary(0, 7); break;
+ case 2: __kunmap_atomic_primary(0, 8); break;
+ case 3: __kunmap_atomic_primary(0, 9); break;
+ case 4: __kunmap_atomic_primary(0, 10); break;
case 5 ... 5 + NR_TLB_LINES - 1:
__kunmap_atomic_secondary(type - 5, kvaddr);
diff --git a/arch/powerpc/include/asm/kmap_types.h b/arch/powerpc/include/asm/kmap_types.h
index bca8fdc..5acabbd 100644
--- a/arch/powerpc/include/asm/kmap_types.h
+++ b/arch/powerpc/include/asm/kmap_types.h
@@ -10,36 +10,7 @@
* 2 of the License, or (at your option) any later version.
*/
-enum km_type {
- KM_BOUNCE_READ,
- KM_SKB_SUNRPC_DATA,
- KM_SKB_DATA_SOFTIRQ,
- KM_USER0,
- KM_USER1,
- KM_BIO_SRC_IRQ,
- KM_BIO_DST_IRQ,
- KM_PTE0,
- KM_PTE1,
- KM_IRQ0,
- KM_IRQ1,
- KM_SOFTIRQ0,
- KM_SOFTIRQ1,
- KM_PPC_SYNC_PAGE,
- KM_PPC_SYNC_ICACHE,
- KM_KDB,
- KM_TYPE_NR
-};
-
-/*
- * This is a temporary build fix that (so they say on lkml....) should no longer
- * be required after 2.6.33, because of changes planned to the kmap code.
- * Let's try to remove this cruft then.
- */
-#ifdef CONFIG_DEBUG_HIGHMEM
-#define KM_NMI (-1)
-#define KM_NMI_PTE (-1)
-#define KM_IRQ_PTE (-1)
-#endif
+#define KM_TYPE_NR 16
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_KMAP_TYPES_H */
diff --git a/arch/tile/include/asm/kmap_types.h b/arch/tile/include/asm/kmap_types.h
index 3d0f202..92b28e3 100644
--- a/arch/tile/include/asm/kmap_types.h
+++ b/arch/tile/include/asm/kmap_types.h
@@ -23,35 +23,6 @@
* adds 4MB of required address-space. For now we leave KM_TYPE_NR
* set to depth 8.
*/
-enum km_type {
- KM_TYPE_NR = 8
-};
-
-/*
- * We provide dummy definitions of all the stray values that used to be
- * required for kmap_atomic() and no longer are.
- */
-enum {
- KM_BOUNCE_READ,
- KM_SKB_SUNRPC_DATA,
- KM_SKB_DATA_SOFTIRQ,
- KM_USER0,
- KM_USER1,
- KM_BIO_SRC_IRQ,
- KM_BIO_DST_IRQ,
- KM_PTE0,
- KM_PTE1,
- KM_IRQ0,
- KM_IRQ1,
- KM_SOFTIRQ0,
- KM_SOFTIRQ1,
- KM_SYNC_ICACHE,
- KM_SYNC_DCACHE,
- KM_UML_USERCOPY,
- KM_IRQ_PTE,
- KM_NMI,
- KM_NMI_PTE,
- KM_KDB
-};
+#define KM_TYPE_NR 8
#endif /* _ASM_TILE_KMAP_TYPES_H */
diff --git a/arch/tile/mm/highmem.c b/arch/tile/mm/highmem.c
index ef8e5a6..347d123 100644
--- a/arch/tile/mm/highmem.c
+++ b/arch/tile/mm/highmem.c
@@ -93,7 +93,7 @@ static DEFINE_PER_CPU(struct kmap_amps, amps);
* If we examine it earlier we are exposed to a race where it looks
* writable earlier, but becomes immutable before we write the PTE.
*/
-static void kmap_atomic_register(struct page *page, enum km_type type,
+static void kmap_atomic_register(struct page *page, int type,
unsigned long va, pte_t *ptep, pte_t pteval)
{
unsigned long flags;
diff --git a/arch/um/include/asm/kmap_types.h b/arch/um/include/asm/kmap_types.h
index 6c03acd..2e0a6b1 100644
--- a/arch/um/include/asm/kmap_types.h
+++ b/arch/um/include/asm/kmap_types.h
@@ -8,22 +8,6 @@
/* No more #include "asm/arch/kmap_types.h" ! */
-enum km_type {
- KM_BOUNCE_READ,
- KM_SKB_SUNRPC_DATA,
- KM_SKB_DATA_SOFTIRQ,
- KM_USER0,
- KM_USER1,
- KM_UML_USERCOPY, /* UML specific, for copy_*_user - used in do_op_one_page */
- KM_BIO_SRC_IRQ,
- KM_BIO_DST_IRQ,
- KM_PTE0,
- KM_PTE1,
- KM_IRQ0,
- KM_IRQ1,
- KM_SOFTIRQ0,
- KM_SOFTIRQ1,
- KM_TYPE_NR
-};
+#define KM_TYPE_NR 14
#endif
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 216f429..af5280f 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -349,12 +349,12 @@ static void jbd2_block_tag_csum_set(journal_t *j, journal_block_tag_t *tag,
return;
sequence = cpu_to_be32(sequence);
- addr = kmap_atomic(page, KM_USER0);
+ addr = kmap_atomic(page);
csum = jbd2_chksum(j, j->j_csum_seed, (__u8 *)&sequence,
sizeof(sequence));
csum = jbd2_chksum(j, csum, addr + offset_in_page(bh->b_data),
bh->b_size);
- kunmap_atomic(addr, KM_USER0);
+ kunmap_atomic(addr);
tag->t_checksum = cpu_to_be32(csum);
}
diff --git a/fs/pipe.c b/fs/pipe.c
index 49c1065..95cbd6b 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -224,7 +224,7 @@ static void anon_pipe_buf_release(struct pipe_inode_info *pipe,
* and the caller has to be careful not to fault before calling
* the unmap function.
*
- * Note that this function occupies KM_USER0 if @atomic != 0.
+ * Note that this function calls kmap_atomic() if @atomic != 0.
*/
void *generic_pipe_buf_map(struct pipe_inode_info *pipe,
struct pipe_buffer *buf, int atomic)
diff --git a/include/asm-generic/kmap_types.h b/include/asm-generic/kmap_types.h
index 0232ccb..90f99c7 100644
--- a/include/asm-generic/kmap_types.h
+++ b/include/asm-generic/kmap_types.h
@@ -2,39 +2,9 @@
#define _ASM_GENERIC_KMAP_TYPES_H
#ifdef __WITH_KM_FENCE
-# define KMAP_D(n) __KM_FENCE_##n ,
+# define KM_TYPE_NR 41
#else
-# define KMAP_D(n)
+# define KM_TYPE_NR 20
#endif
-enum km_type {
-KMAP_D(0) KM_BOUNCE_READ,
-KMAP_D(1) KM_SKB_SUNRPC_DATA,
-KMAP_D(2) KM_SKB_DATA_SOFTIRQ,
-KMAP_D(3) KM_USER0,
-KMAP_D(4) KM_USER1,
-KMAP_D(5) KM_BIO_SRC_IRQ,
-KMAP_D(6) KM_BIO_DST_IRQ,
-KMAP_D(7) KM_PTE0,
-KMAP_D(8) KM_PTE1,
-KMAP_D(9) KM_IRQ0,
-KMAP_D(10) KM_IRQ1,
-KMAP_D(11) KM_SOFTIRQ0,
-KMAP_D(12) KM_SOFTIRQ1,
-KMAP_D(13) KM_SYNC_ICACHE,
-KMAP_D(14) KM_SYNC_DCACHE,
-/* UML specific, for copy_*_user - used in do_op_one_page */
-KMAP_D(15) KM_UML_USERCOPY,
-KMAP_D(16) KM_IRQ_PTE,
-KMAP_D(17) KM_NMI,
-KMAP_D(18) KM_NMI_PTE,
-KMAP_D(19) KM_KDB,
-/*
- * Remember to update debug_kmap_atomic() when adding new kmap types!
- */
-KMAP_D(20) KM_TYPE_NR
-};
-
-#undef KMAP_D
-
#endif
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index d3999b4..774fa47 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -110,54 +110,15 @@ static inline void kmap_atomic_idx_pop(void)
#endif
/*
- * NOTE:
- * kmap_atomic() and kunmap_atomic() with two arguments are deprecated.
- * We only keep them for backward compatibility, any usage of them
- * are now warned.
- */
-
-#define PASTE(a, b) a ## b
-#define PASTE2(a, b) PASTE(a, b)
-
-#define NARG_(_2, _1, n, ...) n
-#define NARG(...) NARG_(__VA_ARGS__, 2, 1, :)
-
-static inline void __deprecated *kmap_atomic_deprecated(struct page *page,
- enum km_type km)
-{
- return kmap_atomic(page);
-}
-
-#define kmap_atomic1(...) kmap_atomic(__VA_ARGS__)
-#define kmap_atomic2(...) kmap_atomic_deprecated(__VA_ARGS__)
-#define kmap_atomic(...) PASTE2(kmap_atomic, NARG(__VA_ARGS__)(__VA_ARGS__))
-
-static inline void __deprecated __kunmap_atomic_deprecated(void *addr,
- enum km_type km)
-{
- __kunmap_atomic(addr);
-}
-
-/*
* Prevent people trying to call kunmap_atomic() as if it were kunmap()
* kunmap_atomic() should get the return value of kmap_atomic, not the page.
*/
-#define kunmap_atomic_deprecated(addr, km) \
-do { \
- BUILD_BUG_ON(__same_type((addr), struct page *)); \
- __kunmap_atomic_deprecated(addr, km); \
-} while (0)
-
-#define kunmap_atomic_withcheck(addr) \
+#define kunmap_atomic(addr) \
do { \
BUILD_BUG_ON(__same_type((addr), struct page *)); \
__kunmap_atomic(addr); \
} while (0)
-#define kunmap_atomic1(...) kunmap_atomic_withcheck(__VA_ARGS__)
-#define kunmap_atomic2(...) kunmap_atomic_deprecated(__VA_ARGS__)
-#define kunmap_atomic(...) PASTE2(kunmap_atomic, NARG(__VA_ARGS__)(__VA_ARGS__))
-/**** End of C pre-processor tricks for deprecated macros ****/
/* when CONFIG_HIGHMEM is not set these will be plain clear/copy_page */
#ifndef clear_user_highpage
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index e1ac1ce..e11d1c0 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -86,11 +86,9 @@ struct pipe_buf_operations {
* mapping or not. The atomic map is faster, however you can't take
* page faults before calling ->unmap() again. So if you need to eg
* access user data through copy_to/from_user(), then you must get
- * a non-atomic map. ->map() uses the KM_USER0 atomic slot for
- * atomic maps, so you can't map more than one pipe_buffer at once
- * and you have to be careful if mapping another page as source
- * or destination for a copy (IOW, it has to use something else
- * than KM_USER0).
+ * a non-atomic map. ->map() uses the kmap_atomic slot for
+ * atomic maps, you have to be careful if mapping another page as
+ * source or destination for a copy.
*/
void * (*map)(struct pipe_inode_info *, struct pipe_buffer *, int);
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 2aad499..c7ac8e1 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1975,9 +1975,7 @@ static int aligned_vwrite(char *buf, char *addr, unsigned long count)
* IOREMAP area is treated as memory hole and no copy is done.
*
* If [addr...addr+count) doesn't includes any intersects with alive
- * vm_struct area, returns 0.
- * @buf should be kernel's buffer. Because this function uses KM_USER0,
- * the caller should guarantee KM_USER0 is not used.
+ * vm_struct area, returns 0. @buf should be kernel's buffer.
*
* Note: In usual ops, vread() is never necessary because the caller
* should know vmalloc() area is valid and can use memcpy().
@@ -2051,9 +2049,7 @@ finished:
* IOREMAP area is treated as memory hole and no copy is done.
*
* If [addr...addr+count) doesn't includes any intersects with alive
- * vm_struct area, returns 0.
- * @buf should be kernel's buffer. Because this function uses KM_USER0,
- * the caller should guarantee KM_USER0 is not used.
+ * vm_struct area, returns 0. @buf should be kernel's buffer.
*
* Note: In usual ops, vwrite() is never necessary because the caller
* should know vmalloc() area is valid and can use memcpy().
OpenPOWER on IntegriCloud