From a185e44a331149657fc59f35f31ca2b072880748 Mon Sep 17 00:00:00 2001 From: Thomas Chou Date: Sun, 9 Mar 2008 06:46:14 +0800 Subject: [PATCH] nios2: fix clobbered register in local_irq_restore inline asm gregor1 identified a bug and submitted a patch. The function local_irq_restore(x) in include/asm/system.h in the current linux kernel seems to have a big problem. The register r8 will not be reserved. So the compiler can use this variable for the normal c-code. This patch adds register r8 to the clobber list of the inline asm. Signed-off-by: Thomas Chou --- linux-2.6.x/include/asm-nios2nommu/system.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/linux-2.6.x/include/asm-nios2nommu/system.h b/linux-2.6.x/include/asm-nios2nommu/system.h index a6ea4c8..a9e01c7 100644 --- a/linux-2.6.x/include/asm-nios2nommu/system.h +++ b/linux-2.6.x/include/asm-nios2nommu/system.h @@ -74,7 +74,7 @@ asmlinkage void resume(void); #define local_irq_restore(x) __asm__ __volatile__ ( \ "mov r8, %0\n" \ "wrctl status, r8\n" \ - : :"r" (x) : "memory") + : :"r" (x) : "r8", "memory") /* For spinlocks etc */ #define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } while (0) -- 1.5.3.3