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Commit 2ba3e3e6 authored by Keith Owens's avatar Keith Owens Committed by Tony Luck
Browse files

[IA64] restore_sigcontext is not preempt safe 



restore_sigcontext calls ia64_set_local_fpu_owner() which requires that
preempt be disabled.

Signed-off-by: default avatarKeith Owens <kaos@sgi.com>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 7fe4c1b1

arch/ia64/kernel/signal.c

+2 −0
Original line number Diff line number Diff line
@@ -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;

}