ARM: entry: prefetch abort: tail-call the main prefetch abort handler

Tail-call the main C prefetch abort handler code from the per-CPU
helper code.  Also note that the helper function becomes ABI
compliant in terms of the registers preserved.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 5 insertions, 4 deletions

diff --git a/arch/arm/mm/pabort-legacy.S b/arch/arm/mm/pabort-legacy.S
index 8a5d8aaf2d5e..8bbff025269a 100644
--- a/arch/arm/mm/pabort-legacy.S
+++ b/arch/arm/mm/pabort-legacy.S
@@ -4,10 +4,11 @@
 /*
  * Function: legacy_pabort
  *
- * Params  : r4 = address of aborted instruction
+ * Params  : r2 = pt_regs
+ *         : r4 = address of aborted instruction
+ *         : r5 = psr for parent context
  *
- * Returns : r0 = address of abort
- *         : r1 = Simulated IFSR with section translation fault status
+ * Returns : r4 - r11, r13 preserved
  *
  * Purpose : obtain information about current prefetch abort.
  */
@@ -16,5 +17,5 @@
 ENTRY(legacy_pabort)
         mov     r0, r4
         mov     r1, #5
-        mov     pc, lr
+        b       do_PrefetchAbort
 ENDPROC(legacy_pabort)