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[PATCH] poison: add & use more constants 

Add more poison values to include/linux/poison.h.  It's not clear to me
whether some others should be added or not, so I haven't added any of
these:

./include/linux/libata.h:#define ATA_TAG_POISON		0xfafbfcfdU
./arch/ppc/8260_io/fcc_enet.c:1918:	memset((char *)(&(immap->im_dprambase[(mem_addr+64)])), 0x88, 32);
./drivers/usb/mon/mon_text.c:429:	memset(mem, 0xe5, sizeof(struct mon_event_text));
./drivers/char/ftape/lowlevel/ftape-ctl.c:738:		memset(ft_buffer[i]->address, 0xAA, FT_BUFF_SIZE);
./drivers/block/sx8.c:/* 0xf is just arbitrary, non-zero noise; this is sorta like poisoning */

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Randy Dunlap 2006-06-27 02:53:54 -07:00 committed by Linus Torvalds
parent b3c681e091
commit a7807a32bb
3 changed files with 12 additions and 3 deletions
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7
include/linux/poison.h
View File

@ -45,6 +45,13 @@
/********** drivers/atm/ **********/
#define ATM_POISON_FREE 0x12
/********** kernel/mutexes **********/
#define MUTEX_DEBUG_INIT 0x11
#define MUTEX_DEBUG_FREE 0x22
/********** security/ **********/
#define KEY_DESTROY 0xbd
/********** sound/oss/ **********/
#define OSS_POISON_FREE 0xAB

5
kernel/mutex-debug.c
View File

@ -16,6 +16,7 @@
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/poison.h>
#include <linux/spinlock.h>
#include <linux/kallsyms.h>
#include <linux/interrupt.h>
@ -381,7 +382,7 @@ void debug_mutex_set_owner(struct mutex *lock,
void debug_mutex_init_waiter(struct mutex_waiter *waiter)
{
memset(waiter, 0x11, sizeof(*waiter));
memset(waiter, MUTEX_DEBUG_INIT, sizeof(*waiter));
waiter->magic = waiter;
INIT_LIST_HEAD(&waiter->list);
}
@ -397,7 +398,7 @@ void debug_mutex_wake_waiter(struct mutex *lock, struct mutex_waiter *waiter)
void debug_mutex_free_waiter(struct mutex_waiter *waiter)
{
DEBUG_WARN_ON(!list_empty(&waiter->list));
memset(waiter, 0x22, sizeof(*waiter));
memset(waiter, MUTEX_DEBUG_FREE, sizeof(*waiter));
}
void debug_mutex_add_waiter(struct mutex *lock, struct mutex_waiter *waiter,

3
security/keys/key.c
View File

@ -11,6 +11,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/poison.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/security.h>
@ -988,7 +989,7 @@ void unregister_key_type(struct key_type *ktype)
if (key->type == ktype) {
if (ktype->destroy)
ktype->destroy(key);
memset(&key->payload, 0xbd, sizeof(key->payload));
memset(&key->payload, KEY_DESTROY, sizeof(key->payload));
}
}