Commit 615c9136 authored Oct 12, 2008 by David S. Miller

chmc: Mark %ver register inline asm with volatile



Otherwise GCC can try to do the register read before the guarding test
on us3mc_platform() being true.

If that happens we can take an exception, because %ver register reads
are not allowed in privileged more on hypervisor platforms.

Signed-off-by: David S. Miller <davem@davemloft.net>

parent 82960b85

arch/sparc64/kernel/chmc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -831,7 +831,7 @@ static int __init us3mc_init(void)
		if (!us3mc_platform())
		return -ENODEV;

		__asm__ ("rdpr %%ver, %0" : "=r" (ver));
		__asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver));
		if ((ver >> 32UL) == __JALAPENO_ID \|\|
		(ver >> 32UL) == __SERRANO_ID) {
		mc_type = MC_TYPE_JBUS;