linux-kernel - Re: Sparc-32 doesn't work in 3.1.

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Date:	Wed, 14 Dec 2011 13:18:10 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	slyich@...il.com
Cc:	rob@...dley.net, aboriginal@...ts.landley.net,
	linux-kernel@...r.kernel.org, tytso@....edu,
	sparclinux@...r.kernel.org, jakub@...hat.com
Subject: Re: Sparc-32 doesn't work in 3.1.

From: David Miller <davem@...emloft.net>
Date: Wed, 14 Dec 2011 12:54:43 -0500 (EST)

> The right fix is to simply teach btfixup to be able to patch
> the 'restore' just as equally as it would patch an 'or'.

Try this:

--------------------
sparc32: Be less strict in matching %lo part of relocation.

The "(insn & 0x01800000) != 0x01800000" test matches 'restore'
but that is a legitimate place to see the %lo() part of a 32-bit
symbol relocation, particularly in tail calls.

Signed-off-by: David S. Miller <davem@...emloft.net>
---
 arch/sparc/mm/btfixup.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/arch/sparc/mm/btfixup.c b/arch/sparc/mm/btfixup.c
index 5175ac2..8a7f817 100644
--- a/arch/sparc/mm/btfixup.c
+++ b/arch/sparc/mm/btfixup.c
@@ -302,8 +302,7 @@ void __init btfixup(void)
 				case 'i':	/* INT */
 					if ((insn & 0xc1c00000) == 0x01000000) /* %HI */
 						set_addr(addr, q[1], fmangled, (insn & 0xffc00000) | (p[1] >> 10));
-					else if ((insn & 0x80002000) == 0x80002000 &&
-					         (insn & 0x01800000) != 0x01800000) /* %LO */
+					else if ((insn & 0x80002000) == 0x80002000) /* %LO */
 						set_addr(addr, q[1], fmangled, (insn & 0xffffe000) | (p[1] & 0x3ff));
 					else {
 						prom_printf(insn_i, p, addr, insn);
-- 
1.7.6.401.g6a319

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