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[IA64] restore_sigcontext is not preempt safe

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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>
This commit is contained in:
Keith Owens
2005-06-30 22:53:00 -07:00
committed by Tony Luck
parent 7fe4c1b168
commit 2ba3e3e65c
1 changed files with 2 additions and 0 deletions
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2
arch/ia64/kernel/signal.c
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@@ -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); __copy_from_user(current->thread.fph, &sc->sc_fr[32], 96*16);
psr->mfh = 0; /* drop signal handler's fph contents... */ psr->mfh = 0; /* drop signal handler's fph contents... */
preempt_disable();
if (psr->dfh) if (psr->dfh)
ia64_drop_fpu(current); ia64_drop_fpu(current);
else { else {
@@ -150,6 +151,7 @@ restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr)
__ia64_load_fpu(current->thread.fph); __ia64_load_fpu(current->thread.fph);
ia64_set_local_fpu_owner(current); ia64_set_local_fpu_owner(current);
} }
preempt_enable();
} }
return err; return err;
} }