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author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-10-26 14:21:47 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 16:52:08 -0700 |
commit | 61ecdb801ef2cd28e32442383106d7837d76deac (patch) | |
tree | 3ec4f04e09cc4a9b76dafaaa0c4dfd07e825e632 | |
parent | 2e30244a7cc1ff09013a1238d415b4076406388e (diff) | |
download | linux-61ecdb801ef2cd28e32442383106d7837d76deac.tar.gz linux-61ecdb801ef2cd28e32442383106d7837d76deac.tar.bz2 linux-61ecdb801ef2cd28e32442383106d7837d76deac.zip |
mm: strictly nested kmap_atomic()
Ensure kmap_atomic() usage is strictly nested
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | crypto/async_tx/async_memcpy.c | 2 | ||||
-rw-r--r-- | crypto/blkcipher.c | 2 | ||||
-rw-r--r-- | drivers/block/loop.c | 4 | ||||
-rw-r--r-- | include/linux/highmem.h | 4 | ||||
-rw-r--r-- | kernel/power/snapshot.c | 4 |
5 files changed, 8 insertions, 8 deletions
diff --git a/crypto/async_tx/async_memcpy.c b/crypto/async_tx/async_memcpy.c index 0ec1fb69d4ea..518c22bd9562 100644 --- a/crypto/async_tx/async_memcpy.c +++ b/crypto/async_tx/async_memcpy.c @@ -83,8 +83,8 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset, memcpy(dest_buf, src_buf, len); - kunmap_atomic(dest_buf, KM_USER0); kunmap_atomic(src_buf, KM_USER1); + kunmap_atomic(dest_buf, KM_USER0); async_tx_sync_epilog(submit); } diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c index 90d26c91f4e9..7a7219266e3c 100644 --- a/crypto/blkcipher.c +++ b/crypto/blkcipher.c @@ -89,9 +89,9 @@ static inline unsigned int blkcipher_done_fast(struct blkcipher_walk *walk, memcpy(walk->dst.virt.addr, walk->page, n); blkcipher_unmap_dst(walk); } else if (!(walk->flags & BLKCIPHER_WALK_PHYS)) { - blkcipher_unmap_src(walk); if (walk->flags & BLKCIPHER_WALK_DIFF) blkcipher_unmap_dst(walk); + blkcipher_unmap_src(walk); } scatterwalk_advance(&walk->in, n); diff --git a/drivers/block/loop.c b/drivers/block/loop.c index 6c48b3545f84..450c958b514f 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -101,8 +101,8 @@ static int transfer_none(struct loop_device *lo, int cmd, else memcpy(raw_buf, loop_buf, size); - kunmap_atomic(raw_buf, KM_USER0); kunmap_atomic(loop_buf, KM_USER1); + kunmap_atomic(raw_buf, KM_USER0); cond_resched(); return 0; } @@ -130,8 +130,8 @@ static int transfer_xor(struct loop_device *lo, int cmd, for (i = 0; i < size; i++) *out++ = *in++ ^ key[(i & 511) % keysize]; - kunmap_atomic(raw_buf, KM_USER0); kunmap_atomic(loop_buf, KM_USER1); + kunmap_atomic(raw_buf, KM_USER0); cond_resched(); return 0; } diff --git a/include/linux/highmem.h b/include/linux/highmem.h index e3060ef85b6d..283cd47bb34c 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -201,8 +201,8 @@ static inline void copy_user_highpage(struct page *to, struct page *from, vfrom = kmap_atomic(from, KM_USER0); vto = kmap_atomic(to, KM_USER1); copy_user_page(vto, vfrom, vaddr, to); - kunmap_atomic(vfrom, KM_USER0); kunmap_atomic(vto, KM_USER1); + kunmap_atomic(vfrom, KM_USER0); } #endif @@ -214,8 +214,8 @@ static inline void copy_highpage(struct page *to, struct page *from) vfrom = kmap_atomic(from, KM_USER0); vto = kmap_atomic(to, KM_USER1); copy_page(vto, vfrom); - kunmap_atomic(vfrom, KM_USER0); kunmap_atomic(vto, KM_USER1); + kunmap_atomic(vfrom, KM_USER0); } #endif /* _LINUX_HIGHMEM_H */ diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index ac7eb109f196..9e3581f4619a 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -984,8 +984,8 @@ static void copy_data_page(unsigned long dst_pfn, unsigned long src_pfn) src = kmap_atomic(s_page, KM_USER0); dst = kmap_atomic(d_page, KM_USER1); do_copy_page(dst, src); - kunmap_atomic(src, KM_USER0); kunmap_atomic(dst, KM_USER1); + kunmap_atomic(src, KM_USER0); } else { if (PageHighMem(d_page)) { /* Page pointed to by src may contain some kernel @@ -2273,8 +2273,8 @@ swap_two_pages_data(struct page *p1, struct page *p2, void *buf) memcpy(buf, kaddr1, PAGE_SIZE); memcpy(kaddr1, kaddr2, PAGE_SIZE); memcpy(kaddr2, buf, PAGE_SIZE); - kunmap_atomic(kaddr1, KM_USER0); kunmap_atomic(kaddr2, KM_USER1); + kunmap_atomic(kaddr1, KM_USER0); } /** |