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mm/kasan/kasan.c: rename XXX_is_zero to XXX_is_nonzero 

They return positive value, that is, true, if non-zero value is found.
Rename them to reduce confusion.

Link: http://lkml.kernel.org/r/20170516012350.GA16015@js1304-desktop
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joonsoo Kim 2017-07-10 15:50:37 -07:00 committed by Linus Torvalds
parent fa69b5989b
commit f5bd62cd44
1 changed files with 7 additions and 7 deletions
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14
mm/kasan/kasan.c
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@ -160,7 +160,7 @@ static __always_inline bool memory_is_poisoned_16(unsigned long addr)
return *shadow_addr;
}
static __always_inline unsigned long bytes_is_zero(const u8 *start,
static __always_inline unsigned long bytes_is_nonzero(const u8 *start,
size_t size)
{
while (size) {
@ -173,7 +173,7 @@ static __always_inline unsigned long bytes_is_zero(const u8 *start,
return 0;
}
static __always_inline unsigned long memory_is_zero(const void *start,
static __always_inline unsigned long memory_is_nonzero(const void *start,
const void *end)
{
unsigned int words;
@ -181,11 +181,11 @@ static __always_inline unsigned long memory_is_zero(const void *start,
unsigned int prefix = (unsigned long)start % 8;
if (end - start <= 16)
return bytes_is_zero(start, end - start);
return bytes_is_nonzero(start, end - start);
if (prefix) {
prefix = 8 - prefix;
ret = bytes_is_zero(start, prefix);
ret = bytes_is_nonzero(start, prefix);
if (unlikely(ret))
return ret;
start += prefix;
@ -194,12 +194,12 @@ static __always_inline unsigned long memory_is_zero(const void *start,
words = (end - start) / 8;
while (words) {
if (unlikely(*(u64 *)start))
return bytes_is_zero(start, 8);
return bytes_is_nonzero(start, 8);
start += 8;
words--;
}
return bytes_is_zero(start, (end - start) % 8);
return bytes_is_nonzero(start, (end - start) % 8);
}
static __always_inline bool memory_is_poisoned_n(unsigned long addr,
@ -207,7 +207,7 @@ static __always_inline bool memory_is_poisoned_n(unsigned long addr,
{
unsigned long ret;
ret = memory_is_zero(kasan_mem_to_shadow((void *)addr),
ret = memory_is_nonzero(kasan_mem_to_shadow((void *)addr),
kasan_mem_to_shadow((void *)addr + size - 1) + 1);
if (unlikely(ret)) {