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ARM: Fix csum_partial_copy_from_user() 

Using the parent functions frame pointer to access our arguments is
completely wrong, whether or not we're building with frame pointers
or not.  What we should be using is the stack pointer to get at the
word above the registers we stacked ourselves.

Reported-by: Bosko Radivojevic <bosko.radivojevic@gmail.com>
Tested-by: Bosko Radivojevic <bosko.radivojevic@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2010-07-26 12:18:16 +01:00
parent f9578fc078
commit 4609a179c9
1 changed files with 1 additions and 1 deletions
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2
arch/arm/lib/csumpartialcopyuser.S
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@ -71,7 +71,7 @@
.pushsection .fixup,"ax" .pushsection .fixup,"ax"
.align 4 .align 4
9001: mov r4, #-EFAULT 9001: mov r4, #-EFAULT
ldr r5, [fp, #4] @ *err_ptr ldr r5, [sp, #8*4] @ *err_ptr
str r4, [r5] str r4, [r5]
ldmia sp, {r1, r2} @ retrieve dst, len ldmia sp, {r1, r2} @ retrieve dst, len
add r2, r2, r1 add r2, r2, r1