linux-kernel - linux-next: build failure after merge of the vfs tree

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Message-ID: <20201027151414.2018d5fd@canb.auug.org.au>
Date:   Tue, 27 Oct 2020 15:14:14 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Al Viro <viro@...IV.linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the vfs tree

Hi all,

After merging the vfs tree, today's linux-next build (sparc_defconfig)
failed like this:

arch/sparc/lib/memset.S: Assembler messages:
arch/sparc/lib/memset.S:149: Error: Unknown opcode: `ext(12b, 13b,21f)'

Caused by commit

  0e0bbae08a6e ("sparc32: switch __bzero() away from range exception table entries")

merging badly with commit

  7780918b3648 ("sparc32: fix a user-triggerable oops in clear_user()")

from the sparc tree.

The sparc tree commit above appears as commit

  80537bbf19d6 ("sparc32: fix a user-triggerable oops in clear_user()")

in the vfs tree as well.  The patch adds one line which is later removed
by commit

  0e0bbae08a6e ("sparc32: switch __bzero() away from range exception table entries")

in the vfs tree, but the git merge puts the line back again :-(

I have added the following fix to the vfs tree merge

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Tue, 27 Oct 2020 15:05:28 +1100
Subject: [PATCH] fix up for merge of arch/sparc/lib/memset.S

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 arch/sparc/lib/memset.S | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/sparc/lib/memset.S b/arch/sparc/lib/memset.S
index 522f45a952a0..eaff68213fdf 100644
--- a/arch/sparc/lib/memset.S
+++ b/arch/sparc/lib/memset.S
@@ -146,7 +146,6 @@ __bzero:
 	ZERO_LAST_BLOCKS(%o0, 0x48, %g2)
 	ZERO_LAST_BLOCKS(%o0, 0x08, %g2)
 13:
-	EXT(12b, 13b, 21f)
 	be	8f
 	 andcc	%o1, 4, %g0
 
-- 
2.28.0

-- 
Cheers,
Stephen Rothwell

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