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kmemleak: Inform kmemleak about pid_hash

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Kmemleak does not track alloc_bootmem calls but the pid_hash allocated
in pidhash_init() would need to be scanned as it contains pointers to
struct pid objects.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Catalin Marinas
2009-06-29 17:13:55 +01:00
parent b6e687221e
commit 12de38b186
1 changed files with 7 additions and 0 deletions
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7
kernel/pid.c
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@@ -36,6 +36,7 @@
#include <linux/pid_namespace.h> #include <linux/pid_namespace.h>
#include <linux/init_task.h> #include <linux/init_task.h>
#include <linux/syscalls.h> #include <linux/syscalls.h>
#include <linux/kmemleak.h>
#define pid_hashfn(nr, ns) \ #define pid_hashfn(nr, ns) \
hash_long((unsigned long)nr + (unsigned long)ns, pidhash_shift) hash_long((unsigned long)nr + (unsigned long)ns, pidhash_shift)
@@ -512,6 +513,12 @@ void __init pidhash_init(void)
pid_hash = alloc_bootmem(pidhash_size * sizeof(*(pid_hash))); pid_hash = alloc_bootmem(pidhash_size * sizeof(*(pid_hash)));
if (!pid_hash) if (!pid_hash)
panic("Could not alloc pidhash!\n"); panic("Could not alloc pidhash!\n");
/*
* pid_hash contains references to allocated struct pid objects and it
* must be scanned by kmemleak to avoid false positives.
*/
kmemleak_alloc(pid_hash, pidhash_size * sizeof(*(pid_hash)), 0,
GFP_KERNEL);
for (i = 0; i < pidhash_size; i++) for (i = 0; i < pidhash_size; i++)
INIT_HLIST_HEAD(&pid_hash[i]); INIT_HLIST_HEAD(&pid_hash[i]);
} }