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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-06-26 16:01:26 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-07-02 10:56:11 +0100
commitda7404725781bc7c736e10cae5521e5604e222a5 (patch)
treee816cd79e1b09ddcbd41b7cd5b3c6c9c9bd5eb98 /arch/arm/kernel/entry-armv.S
parent0d147db0c127c561f8f9ead9f3c1ec38f89f1040 (diff)
downloadlinux-da7404725781bc7c736e10cae5521e5604e222a5.tar.gz
ARM: entry: data abort: tail-call the main data abort handler
Tail-call the main C data abort handler code from the per-CPU helper code. Update the comments in the code wrt the new calling and return register state. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/entry-armv.S')
-rw-r--r--arch/arm/kernel/entry-armv.S14
1 files changed, 4 insertions, 10 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 85298c09325..bbdd443b805 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -60,6 +60,7 @@
@
@ Call the processor-specific abort handler:
@
+ @ r2 - pt_regs
@ r4 - aborted context pc
@ r5 - aborted context psr
@
@@ -186,13 +187,8 @@ ENDPROC(__und_invalid)
.align 5
__dabt_svc:
svc_entry
- dabt_helper
-
- @
- @ call main handler
- @
mov r2, sp
- bl do_DataAbort
+ dabt_helper
@
@ IRQs off again before pulling preserved data off the stack
@@ -407,11 +403,9 @@ ENDPROC(__pabt_svc)
__dabt_usr:
usr_entry
kuser_cmpxchg_check
- dabt_helper
-
mov r2, sp
- adr lr, BSYM(ret_from_exception)
- b do_DataAbort
+ dabt_helper
+ b ret_from_exception
UNWIND(.fnend )
ENDPROC(__dabt_usr)