[ARM] 3965/1: ixp2000: fix handling of pci master aborts

The master abort check in ixp2000_pci_read_config() recently started
failing due to the compiler optimising out the read access following
the clearing of pci_master_aborts.  Mark pci_master_aborts volatile to
force the compiler to reload it on every use.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-ixp2000/pci.c b/arch/arm/mach-ixp2000/pci.c
index d4bf1e1c0031c5e79a1051790a02c817c6b3218d..5a09a90c08fb7f3e36df1a2f2967e01616a6ea5e 100644 (file)
--- a/arch/arm/mach-ixp2000/pci.c
+++ b/arch/arm/mach-ixp2000/pci.c
@@ -32,7 +32,7 @@
 
 #include <asm/mach/pci.h>
 
-static int pci_master_aborts = 0;
+static volatile int pci_master_aborts = 0;
 
 static int clear_master_aborts(void);