ARM: 8018/1: Add {inc,dec}_preempt_count asm macros

The patch adds asm macros for inc_preempt_count and dec_preempt_count_ti
(which also gets the current thread_info) instead of open-coding them in
arch/arm/vfp/*.S files.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Arun KS <getarunks@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 5 insertions, 29 deletions

diff --git a/arch/arm/vfp/entry.S b/arch/arm/vfp/entry.S
index 9cc290ae4e3b..f0759e70fb86 100644
--- a/arch/arm/vfp/entry.S
+++ b/arch/arm/vfp/entry.S
@@ -25,11 +25,7 @@
 @  IRQs disabled.
 @
 ENTRY(do_vfp)
-#ifdef CONFIG_PREEMPT_COUNT
-        ldr     r4, [r10, #TI_PREEMPT]  @ get preempt count
-        add     r11, r4, #1             @ increment it
-        str     r11, [r10, #TI_PREEMPT]
-#endif
+        inc_preempt_count r10, r4
         enable_irq
         ldr     r4, .LCvfp
         ldr     r11, [r10, #TI_CPU]     @ CPU number
@@ -38,12 +34,7 @@ ENTRY(do_vfp)
 ENDPROC(do_vfp)
 
 ENTRY(vfp_null_entry)
-#ifdef CONFIG_PREEMPT_COUNT
-        get_thread_info r10
-        ldr     r4, [r10, #TI_PREEMPT]  @ get preempt count
-        sub     r11, r4, #1             @ decrement it
-        str     r11, [r10, #TI_PREEMPT]
-#endif
+        dec_preempt_count_ti r10, r4
         mov     pc, lr
 ENDPROC(vfp_null_entry)
 
@@ -56,12 +47,7 @@ ENDPROC(vfp_null_entry)
 
         __INIT
 ENTRY(vfp_testing_entry)
-#ifdef CONFIG_PREEMPT_COUNT
-        get_thread_info r10
-        ldr     r4, [r10, #TI_PREEMPT]  @ get preempt count
-        sub     r11, r4, #1             @ decrement it
-        str     r11, [r10, #TI_PREEMPT]
-#endif
+        dec_preempt_count_ti r10, r4
         ldr     r0, VFP_arch_address
         str     r0, [r0]                @ set to non-zero value
         mov     pc, r9                  @ we have handled the fault
diff --git a/arch/arm/vfp/vfphw.S b/arch/arm/vfp/vfphw.S
index 98f6246c9002..be807625ed8c 100644
--- a/arch/arm/vfp/vfphw.S
+++ b/arch/arm/vfp/vfphw.S
@@ -182,12 +182,7 @@ vfp_hw_state_valid:
                                         @ else it's one 32-bit instruction, so
                                         @ always subtract 4 from the following
                                         @ instruction address.
-#ifdef CONFIG_PREEMPT_COUNT
-        get_thread_info r10
-        ldr     r4, [r10, #TI_PREEMPT]  @ get preempt count
-        sub     r11, r4, #1             @ decrement it
-        str     r11, [r10, #TI_PREEMPT]
-#endif
+        dec_preempt_count_ti r10, r4
         mov     pc, r9                  @ we think we have handled things
 
 
@@ -206,12 +201,7 @@ look_for_VFP_exceptions:
         @ not recognised by VFP
 
         DBGSTR  "not VFP"
-#ifdef CONFIG_PREEMPT_COUNT
-        get_thread_info r10
-        ldr     r4, [r10, #TI_PREEMPT]  @ get preempt count
-        sub     r11, r4, #1             @ decrement it
-        str     r11, [r10, #TI_PREEMPT]
-#endif
+        dec_preempt_count_ti r10, r4
         mov     pc, lr
 
 process_exception: