The patch titled
lockdep: s390 turn validator off in machine-check handler
has been removed from the -mm tree. Its filename is
lockdep-s390-turn-validator-off-in-machine-check-handler.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: lockdep: s390 turn validator off in machine-check handler
From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
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@xxxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/s390/s390mach.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN drivers/s390/s390mach.c~lockdep-s390-turn-validator-off-in-machine-check-handler drivers/s390/s390mach.c
--- a/drivers/s390/s390mach.c~lockdep-s390-turn-validator-off-in-machine-check-handler
+++ a/drivers/s390/s390mach.c
@@ -378,6 +378,8 @@ s390_do_machine_check(struct pt_regs *re
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 *re
mcck->warning = 1;
set_thread_flag(TIF_MCCK_PENDING);
}
+ lockdep_on();
}
/*
_
Patches currently in -mm which might be from heiko.carstens@xxxxxxxxxx are
origin.patch
zfcp-fix-incorrect-usage-of-erp_lock.patch
zfcp-fix-incorrect-usage-of-fsf_req_list_lock.patch
git-klibc.patch
s390-move-var-declarations-behind-ifdef.patch
fix-oddball-boolean-logic-in-s390-netiucv.patch
s390-broken-null-test-in-claw-driver.patch
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