The patch titled
Subject: metag: align thread_info::supervisor_stack
has been added to the -mm tree. Its filename is
all-arches-signal-move-restart_block-to-struct-task_struct-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/all-arches-signal-move-restart_block-to-struct-task_struct-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/all-arches-signal-move-restart_block-to-struct-task_struct-fix.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: James Hogan <james.hogan@xxxxxxxxxx>
Subject: metag: align thread_info::supervisor_stack
Commit a82be12232dc ("all arches, signal: move restart_block to struct
task_struct") removed restart_block from struct thread_info which was the
only thing keeping supervisor_stack and the struct as a whole 64-bit
aligned. This resulted in the initial stack pointer not being 64-bit
aligned, so when arguments are saved to the stack with a 64-bit SETL
instruction the values are corrupted resulting in a pretty early
unserviced memory fault in printk.
This is fixed by explicitly aligning supervisor_stack to 8 bytes.
Fixes: a82be12232dc ("all arches, signal: move restart_block to struct task_struct")
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/metag/include/asm/thread_info.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN arch/metag/include/asm/thread_info.h~all-arches-signal-move-restart_block-to-struct-task_struct-fix arch/metag/include/asm/thread_info.h
--- a/arch/metag/include/asm/thread_info.h~all-arches-signal-move-restart_block-to-struct-task_struct-fix
+++ a/arch/metag/include/asm/thread_info.h
@@ -36,7 +36,7 @@ struct thread_info {
mm_segment_t addr_limit; /* thread address space */
- u8 supervisor_stack[0];
+ u8 supervisor_stack[0] __aligned(8);
};
#else /* !__ASSEMBLY__ */
_
Patches currently in -mm which might be from james.hogan@xxxxxxxxxx are
origin.patch
all-arches-signal-move-restart_block-to-struct-task_struct.patch
all-arches-signal-move-restart_block-to-struct-task_struct-fix.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
