* [patch 2.6.13-rc1] restore_sigcontext is not preempt safe
@ 2005-07-01 5:52 Keith Owens
0 siblings, 0 replies; only message in thread
From: Keith Owens @ 2005-07-01 5:52 UTC (permalink / raw)
To: linux-ia64
restore_sigcontext calls ia64_set_local_fpu_owner() which requires that
preempt be disabled.
Signed-off-by: Keith Owens <kaos@sgi.com>
Index: linux/arch/ia64/kernel/signal.c
=================================--- linux.orig/arch/ia64/kernel/signal.c 2005-07-01 12:27:44.891940980 +1000
+++ linux/arch/ia64/kernel/signal.c 2005-07-01 15:57:08.479428221 +1000
@@ -143,6 +143,7 @@ restore_sigcontext (struct sigcontext __
__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 __
__ia64_load_fpu(current->thread.fph);
ia64_set_local_fpu_owner(current);
}
+ preempt_enable();
}
return err;
}
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2005-07-01 5:52 [patch 2.6.13-rc1] restore_sigcontext is not preempt safe Keith Owens
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