diff mbox

parisc: use long branch in fork_like macro

Message ID 20130516192812.GB357@p100.box (mailing list archive)
State Accepted
Headers show

Commit Message

Helge Deller May 16, 2013, 7:28 p.m. UTC 
please add to stable kernel v3.9
upstream commit bbbfde782084b4f0d85ddffb88f1cf4650ff40e4

From: John David Anglin <dave.anglin@bell.net>

The "b" branch instruction used in the fork_like macro only can handle
17-bit pc-relative offsets.
This fails with an out of range offset with some .config files.
Rewrite to use the "be" instruction which
can branch to any address in a space.

Signed-off-by: John David Anglin  <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>


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diff mbox

Patch

diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index aa486e4..36f4f1d 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -1702,7 +1702,8 @@  ENTRY(sys_\name\()_wrapper)
 	ldo	TASK_REGS(%r1),%r1
 	reg_save %r1
 	mfctl	%cr27, %r28
-	b	sys_\name
+	ldil	L%sys_\name, %r31
+	be	R%sys_\name(%sr4,%r31)
 	STREG	%r28, PT_CR27(%r1)
 ENDPROC(sys_\name\()_wrapper)
 	.endm