The patch titled
Subject: metag: align thread_info::supervisor_stack
has been removed from the -mm tree. Its filename was
all-arches-signal-move-restart_block-to-struct-task_struct-fix.patch
This patch was dropped because it was folded into all-arches-signal-move-restart_block-to-struct-task_struct.patch
------------------------------------------------------
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
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