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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2006-07-03 00:25:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-03 15:27:05 -0700 |
| commit | 8e9ccae6ee2bb19b7752b7d412e1bbbaf28e7fe1 (patch) | |
| tree | 85449e3b5cacd69cefdd353b1767d4fac13f1a80 | |
| parent | 6205120044bb75ca06019491d1aa0e727fdd35be (diff) | |
| download | op-kernel-dev-8e9ccae6ee2bb19b7752b7d412e1bbbaf28e7fe1.zip op-kernel-dev-8e9ccae6ee2bb19b7752b7d412e1bbbaf28e7fe1.tar.gz | |
[PATCH] lockdep: s390 turn validator off in machine-check handler
Machine checks on s390 are always enabled (except in the machine check handler
itself). Therefore use lockdep_off()/on() in the machine check handler to
avoid deadlocks in the lock validator.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/s390/s390mach.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/s390/s390mach.c b/drivers/s390/s390mach.c index 432136f..ffb3677 100644 --- a/drivers/s390/s390mach.c +++ b/drivers/s390/s390mach.c @@ -378,6 +378,8 @@ s390_do_machine_check(struct pt_regs *regs) struct mcck_struct *mcck; int umode; + lockdep_off(); + mci = (struct mci *) &S390_lowcore.mcck_interruption_code; mcck = &__get_cpu_var(cpu_mcck); umode = user_mode(regs); @@ -482,6 +484,7 @@ s390_do_machine_check(struct pt_regs *regs) mcck->warning = 1; set_thread_flag(TIF_MCCK_PENDING); } + lockdep_on(); } /* |
