On Wed, Feb 21, 2007 at 11:00:15AM +0100, Giuseppe Bilotta wrote:
> On Wednesday 21 February 2007 02:49, Greg KH wrote:
>
> > /* frame pointer must be last for get_wchan */
> > -#define SAVE_CONTEXT "pushq %%rbp ; movq %%rsi,%%rbp\n\t"
> > -#define RESTORE_CONTEXT "movq %%rbp,%%rsi ; popq %%rbp\n\t"
> > +#define SAVE_CONTEXT "pushf ; pushq %%rbp ; movq %%rsi,%%rbp\n\t"
> > +#define RESTORE_CONTEXT "movq %%rbp,%%rsi ; popq %%rbp ; popf\t"
>
> No idea if this is a problem or not, but you forgot a \n after popf.
A discussion of this issue is in the thread starting with [1]
(and I'd re-add the \n in -stable kernels with the patch below
(stolen from 2.6.16) no matter what happened in Linus' tree).
> Giuseppe "Oblomov" Bilotta
cu
Adrian
[1] http://lkml.org/lkml/2007/1/8/374
commit e02612a14b2b714e9d231d14c91e729f0f168299
Author: Adrian Bunk <[email protected]>
Date: Tue Jan 9 03:36:59 2007 +0100
x86_64: re-add a newline to RESTORE_CONTEXT
RESTORE_CONTEXT lost a newline:
http://www.mail-archive.com/[email protected]/msg00559.html
Reported by Steven M. Christey.
Signed-off-by: Adrian Bunk <[email protected]>
diff --git a/include/asm-x86_64/system.h b/include/asm-x86_64/system.h
index 7b2c7aa..dacec59 100644
--- a/include/asm-x86_64/system.h
+++ b/include/asm-x86_64/system.h
@@ -21,7 +21,7 @@
/* frame pointer must be last for get_wchan */
#define SAVE_CONTEXT "pushf ; pushq %%rbp ; movq %%rsi,%%rbp\n\t"
-#define RESTORE_CONTEXT "movq %%rbp,%%rsi ; popq %%rbp ; popf\t"
+#define RESTORE_CONTEXT "movq %%rbp,%%rsi ; popq %%rbp ; popf\n\t"
#define __EXTRA_CLOBBER \
,"rcx","rbx","rdx","r8","r9","r10","r11","r12","r13","r14","r15"
-
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