projects
/
cascardo
/
linux.git
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
mm: check the return value of lookup_page_ext for all call sites
[cascardo/linux.git]
/
mm
/
page_poison.c
diff --git
a/mm/page_poison.c
b/mm/page_poison.c
index
1eae5fa
..
2e647c6
100644
(file)
--- a/
mm/page_poison.c
+++ b/
mm/page_poison.c
@@
-54,6
+54,9
@@
static inline void set_page_poison(struct page *page)
struct page_ext *page_ext;
page_ext = lookup_page_ext(page);
struct page_ext *page_ext;
page_ext = lookup_page_ext(page);
+ if (unlikely(!page_ext))
+ return;
+
__set_bit(PAGE_EXT_DEBUG_POISON, &page_ext->flags);
}
__set_bit(PAGE_EXT_DEBUG_POISON, &page_ext->flags);
}
@@
-62,6
+65,9
@@
static inline void clear_page_poison(struct page *page)
struct page_ext *page_ext;
page_ext = lookup_page_ext(page);
struct page_ext *page_ext;
page_ext = lookup_page_ext(page);
+ if (unlikely(!page_ext))
+ return;
+
__clear_bit(PAGE_EXT_DEBUG_POISON, &page_ext->flags);
}
__clear_bit(PAGE_EXT_DEBUG_POISON, &page_ext->flags);
}
@@
-70,7
+76,7
@@
bool page_is_poisoned(struct page *page)
struct page_ext *page_ext;
page_ext = lookup_page_ext(page);
struct page_ext *page_ext;
page_ext = lookup_page_ext(page);
- if (
!page_ext
)
+ if (
unlikely(!page_ext)
)
return false;
return test_bit(PAGE_EXT_DEBUG_POISON, &page_ext->flags);
return false;
return test_bit(PAGE_EXT_DEBUG_POISON, &page_ext->flags);