This is a note to let you know that I've just added the patch titled
ARC: Handle zero-overhead-loop in unaligned access handler
to the 3.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arc-handle-zero-overhead-loop-in-unaligned-access-handler.patch
and it can be found in the queue-3.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From c11eb222fd7d4db91196121dbf854178505d2751 Mon Sep 17 00:00:00 2001
From: Mischa Jonker <[email protected]>
Date: Thu, 26 Sep 2013 15:44:56 +0200
Subject: ARC: Handle zero-overhead-loop in unaligned access handler
From: Mischa Jonker <[email protected]>
commit c11eb222fd7d4db91196121dbf854178505d2751 upstream.
If a load or store is the last instruction in a zero-overhead-loop, and
it's misaligned, the loop would execute only once.
This fixes that problem.
Signed-off-by: Mischa Jonker <[email protected]>
Signed-off-by: Vineet Gupta <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/arc/kernel/unaligned.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/arch/arc/kernel/unaligned.c
+++ b/arch/arc/kernel/unaligned.c
@@ -233,6 +233,12 @@ int misaligned_fixup(unsigned long addre
regs->status32 &= ~STATUS_DE_MASK;
} else {
regs->ret += state.instr_len;
+
+ /* handle zero-overhead-loop */
+ if ((regs->ret == regs->lp_end) && (regs->lp_count)) {
+ regs->ret = regs->lp_start;
+ regs->lp_count--;
+ }
}
return 0;
Patches currently in stable-queue which might be from [email protected] are
queue-3.11/arc-handle-zero-overhead-loop-in-unaligned-access-handler.patch
queue-3.11/arc-fix-__udelay-calculation.patch
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