[PATCH] ARM: 2769/1: cpu_init() stack setup fix

Patch from Catalin Marinas

The compiler allocates r14 for the stk variable in the __asm__ directive.
This is a shadowed register and gets changed when the mode is changed,
causing random values in the SP register. The patch adds a clobber for
the r14 register.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 8cf733daa800..35b7273cfdb4 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -359,7 +359,8 @@ void cpu_init(void)
               "I" (offsetof(struct stack, abt[0])),
               "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE),
               "I" (offsetof(struct stack, und[0])),
-              "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE));
+              "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
+            : "r14");
 }
 
 static struct machine_desc * __init setup_machine(unsigned int nr)