* [PATCH] Fix sysrq/panic for gcc 3.1
@ 2002-04-20 16:33 Andi Kleen
0 siblings, 0 replies; only message in thread
From: Andi Kleen @ 2002-04-20 16:33 UTC (permalink / raw)
To: torvalds; +Cc: linux-kernel
Without this patch a loop checking for emergency_sync_scheduled in panic() is optimized
away by gcc 3.1, which causes hangs in panic.
-Andi
diff -X ../../KDIFX -x *-o -x *-RESERVE -burpN ../../v2.5/linux/drivers/char/sysrq.c linux/drivers/char/sysrq.c
--- ../../v2.5/linux/drivers/char/sysrq.c Thu Mar 28 10:06:16 2002
+++ linux/drivers/char/sysrq.c Fri Apr 12 18:32:46 2002
@@ -186,7 +186,7 @@ static void go_sync(struct super_block *
* block devices and malfunctional network filesystems.
*/
-int emergency_sync_scheduled;
+volatile int emergency_sync_scheduled;
void do_emergency_sync(void) {
struct super_block *sb;
diff -X ../../KDIFX -x *-o -x *-RESERVE -burpN ../../v2.5/linux/include/linux/sysrq.h linux/include/linux/sysrq.h
--- ../../v2.5/linux/include/linux/sysrq.h Wed Apr 17 13:33:34 2002
+++ linux/include/linux/sysrq.h Sat Apr 20 16:12:00 2002
@@ -103,7 +103,7 @@ static inline int __reterr(void)
/* Deferred actions */
-extern int emergency_sync_scheduled;
+extern volatile int emergency_sync_scheduled;
#define EMERG_SYNC 1
#define EMERG_REMOUNT 2
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2002-04-20 17:12 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2002-04-20 16:33 [PATCH] Fix sysrq/panic for gcc 3.1 Andi Kleen
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.