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authorKeith Owens <kaos@sgi.com>2005-06-30 22:53:00 -0700
committerTony Luck <tony.luck@intel.com>2005-07-06 15:31:15 -0700
commit2ba3e3e65cf182436757ba13ea8d564e2950fb56 (patch)
tree7546a5141398e8ecaa493a58a4ca8af11deaf04d
parent7fe4c1b16854f0440939c62b8102cbf5c75e7cdc (diff)
[IA64] restore_sigcontext is not preempt safe
restore_sigcontext calls ia64_set_local_fpu_owner() which requires that preempt be disabled. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
-rw-r--r--arch/ia64/kernel/signal.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c
index edd9f07860b..b8a0a7d257a 100644
--- a/arch/ia64/kernel/signal.c
+++ b/arch/ia64/kernel/signal.c
@@ -143,6 +143,7 @@ restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr)
__copy_from_user(current->thread.fph, &sc->sc_fr[32], 96*16);
psr->mfh = 0; /* drop signal handler's fph contents... */
+ preempt_disable();
if (psr->dfh)
ia64_drop_fpu(current);
else {
@@ -150,6 +151,7 @@ restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr)
__ia64_load_fpu(current->thread.fph);
ia64_set_local_fpu_owner(current);
}
+ preempt_enable();
}
return err;
}