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[4.2.y-ckt,stable] Patch "powerpc/sstep: Fix sstep.c compile on powerpcspe" has been added to the 4.2.y-ckt tree

Message ID 1465483019-27403-1-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa June 9, 2016, 2:36 p.m. UTC 
This is a note to let you know that I have just added a patch titled

    powerpc/sstep: Fix sstep.c compile on powerpcspe

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    https://git.launchpad.net/~canonical-kernel/linux/+git/linux-stable-ckt/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt12.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

From 57218918bf196851028463498704540e8b2158a7 Mon Sep 17 00:00:00 2001
From: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>
Date: Thu, 5 May 2016 16:44:44 -0400
Subject: powerpc/sstep: Fix sstep.c compile on powerpcspe

commit dd21731022faf43c1250050e5d28d11add599149 upstream.

Commit be96f63375a1 ("powerpc: Split out instruction analysis part of
emulate_step()") introduced ldarx and stdcx into the instructions in
sstep.c, which are not accepted by the assembler on powerpcspe, but does
seem to be accepted by the normal powerpc assembler even in 32 bit mode.

Wrap these two instructions in a __powerpc64__ check like it is
everywhere else in the file.

Fixes: be96f63375a1 ("powerpc: Split out instruction analysis part of emulate_step()")
Signed-off-by: Len Sorensen <lsorense@csclub.uwaterloo.ca>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 arch/powerpc/lib/sstep.c | 4 ++++
 1 file changed, 4 insertions(+)

--
2.7.4
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Patch

diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index dc885b3..6d34310 100644
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -1818,9 +1818,11 @@  int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
 		case 4:
 			__get_user_asmx(val, op.ea, err, "lwarx");
 			break;
+#ifdef __powerpc64__
 		case 8:
 			__get_user_asmx(val, op.ea, err, "ldarx");
 			break;
+#endif
 		default:
 			return 0;
 		}
@@ -1841,9 +1843,11 @@  int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
 		case 4:
 			__put_user_asmx(op.val, op.ea, err, "stwcx.", cr);
 			break;
+#ifdef __powerpc64__
 		case 8:
 			__put_user_asmx(op.val, op.ea, err, "stdcx.", cr);
 			break;
+#endif
 		default:
 			return 0;
 		}