Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / arch / arm / kernel / iwmmxt.S

diff --git a/arch/arm/kernel/iwmmxt.S b/arch/arm/kernel/iwmmxt.S
index 24c7b04..b63b528 100644 (file)
--- a/arch/arm/kernel/iwmmxt.S
+++ b/arch/arm/kernel/iwmmxt.S
@@ -271,30 +271,27 @@ ENTRY(iwmmxt_task_restore)
 /*
  * Concan handling on task switch
  *
- * r0 = previous task_struct pointer (must be preserved)
- * r1 = previous thread_info pointer
- * r2 = next thread_info.cpu_domain pointer (must be preserved)
+ * r0 = next thread_info pointer
  *
- * Called only from __switch_to with task preemption disabled.
- * No need to care about preserving r4 and above.
+ * Called only from the iwmmxt notifier with task preemption disabled.
  */
 ENTRY(iwmmxt_task_switch)
 
-       mrc     p15, 0, r4, c15, c1, 0
-       tst     r4, #0x3                        @ CP0 and CP1 accessible?
+       mrc     p15, 0, r1, c15, c1, 0
+       tst     r1, #0x3                        @ CP0 and CP1 accessible?
        bne     1f                              @ yes: block them for next task
 
-       ldr     r5, =concan_owner
-       add     r6, r2, #(TI_IWMMXT_STATE - TI_CPU_DOMAIN) @ get next task Concan save area
-       ldr     r5, [r5]                        @ get current Concan owner
-       teq     r5, r6                          @ next task owns it?
+       ldr     r2, =concan_owner
+       add     r3, r0, #TI_IWMMXT_STATE        @ get next task Concan save area
+       ldr     r2, [r2]                        @ get current Concan owner
+       teq     r2, r3                          @ next task owns it?
        movne   pc, lr                          @ no: leave Concan disabled
 
-1:     eor     r4, r4, #3                      @ flip Concan access
-       mcr     p15, 0, r4, c15, c1, 0
+1:     eor     r1, r1, #3                      @ flip Concan access
+       mcr     p15, 0, r1, c15, c1, 0
 
-       mrc     p15, 0, r4, c2, c0, 0
-       sub     pc, lr, r4, lsr #32             @ cpwait and return
+       mrc     p15, 0, r1, c2, c0, 0
+       sub     pc, lr, r1, lsr #32             @ cpwait and return
 
 /*
  * Remove Concan ownership of given task