[PATCH] spufs: clean up use of bitops

checking bits manually might not be synchonized with
the use of set_bit/clear_bit. Make sure we always use
the correct bitops by removing the unnecessary
identifiers.

Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index 3a53021..ae83547 100644 (file)
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -63,7 +63,7 @@ static void spu_restart_dma(struct spu *spu)
 {
        struct spu_priv2 __iomem *priv2 = spu->priv2;
 
-       if (!test_bit(SPU_CONTEXT_SWITCH_PENDING_nr, &spu->flags))
+       if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags))
                out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
 }
 
@@ -75,7 +75,7 @@ static int __spu_trap_data_seg(struct spu *spu, unsigned long ea)
 
        pr_debug("%s\n", __FUNCTION__);
 
-       if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE_nr, &spu->flags)) {
+       if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
                /* SLBs are pre-loaded for context switch, so
                 * we should never get here!
                 */
@@ -122,7 +122,7 @@ static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
                return 0;
        }
 
-       if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE_nr, &spu->flags)) {
+       if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
                printk("%s: invalid access during switch!\n", __func__);
                return 1;
        }

diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 719ff27..c34198c 100644 (file)
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -214,14 +214,14 @@ static void spu_reaper(void *data)
 
        down_write(&ctx->state_sema);
        spu = ctx->spu;
-       if (spu && (ctx->flags & SPU_CONTEXT_PREEMPT)) {
+       if (spu && test_bit(SPU_CONTEXT_PREEMPT, &ctx->flags)) {
                if (atomic_read(&spu->rq->prio.nr_blocked)) {
                        pr_debug("%s: spu=%d\n", __func__, spu->number);
                        ctx->ops->runcntl_stop(ctx);
                        spu_deactivate(ctx);
                        wake_up_all(&ctx->stop_wq);
                } else {
-                       clear_bit(SPU_CONTEXT_PREEMPT_nr, &ctx->flags);
+                       clear_bit(SPU_CONTEXT_PREEMPT, &ctx->flags);
                }
        }
        up_write(&ctx->state_sema);
@@ -234,7 +234,7 @@ static void schedule_spu_reaper(struct spu_runqueue *rq, struct spu *spu)
        unsigned long now = jiffies;
        unsigned long expire = spu->timestamp + SPU_MIN_TIMESLICE;
 
-       set_bit(SPU_CONTEXT_PREEMPT_nr, &ctx->flags);
+       set_bit(SPU_CONTEXT_PREEMPT, &ctx->flags);
        INIT_WORK(&ctx->reap_work, spu_reaper, ctx);
        if (time_after(now, expire))
                schedule_work(&ctx->reap_work);
@@ -250,7 +250,7 @@ static void check_preempt_active(struct spu_runqueue *rq)
        list_for_each(p, &rq->active_list) {
                struct spu *spu = list_entry(p, struct spu, sched_list);
                struct spu_context *ctx = spu->ctx;
-               if (!(ctx->flags & SPU_CONTEXT_PREEMPT)) {
+               if (!test_bit(SPU_CONTEXT_PREEMPT, &ctx->flags)) {
                        if (!worst || (spu->prio > worst->prio)) {
                                worst = spu;
                        }

diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index b504744..48961ac 100644 (file)
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -37,8 +37,7 @@ enum {
 
 struct spu_context_ops;
 
-#define SPU_CONTEXT_PREEMPT_nr          0UL
-#define SPU_CONTEXT_PREEMPT             (1UL << SPU_CONTEXT_PREEMPT_nr)
+#define SPU_CONTEXT_PREEMPT          0UL
 
 struct spu_context {
        struct spu *spu;                  /* pointer to a physical SPU */

diff --git a/arch/powerpc/platforms/cell/spufs/switch.c b/arch/powerpc/platforms/cell/spufs/switch.c
index 010a9fe..de1ad14 100644 (file)
--- a/arch/powerpc/platforms/cell/spufs/switch.c
+++ b/arch/powerpc/platforms/cell/spufs/switch.c
@@ -165,7 +165,7 @@ static inline void set_switch_pending(struct spu_state *csa, struct spu *spu)
         * Restore, Step 5:
         *     Set a software context switch pending flag.
         */
-       set_bit(SPU_CONTEXT_SWITCH_PENDING_nr, &spu->flags);
+       set_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags);
        mb();
 }
 
@@ -767,8 +767,8 @@ static inline void set_switch_active(struct spu_state *csa, struct spu *spu)
         *     Change the software context switch pending flag
         *     to context switch active.
         */
-       set_bit(SPU_CONTEXT_SWITCH_ACTIVE_nr, &spu->flags);
-       clear_bit(SPU_CONTEXT_SWITCH_PENDING_nr, &spu->flags);
+       set_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags);
+       clear_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags);
        mb();
 }
 
@@ -1786,7 +1786,7 @@ static inline void reset_switch_active(struct spu_state *csa, struct spu *spu)
        /* Restore, Step 74:
         *     Reset the "context switch active" flag.
         */
-       clear_bit(SPU_CONTEXT_SWITCH_ACTIVE_nr, &spu->flags);
+       clear_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags);
        mb();
 }
 

diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h
index ee337e3..6b2aea0 100644 (file)
--- a/include/asm-powerpc/spu.h
+++ b/include/asm-powerpc/spu.h
@@ -102,10 +102,8 @@
 #define MFC_MULTI_SRC_EVENT                 0x00001000
 
 /* Flags indicating progress during context switch. */
-#define SPU_CONTEXT_SWITCH_PENDING_nr  0UL
-#define SPU_CONTEXT_SWITCH_ACTIVE_nr   1UL
-#define SPU_CONTEXT_SWITCH_PENDING     (1UL << SPU_CONTEXT_SWITCH_PENDING_nr)
-#define SPU_CONTEXT_SWITCH_ACTIVE      (1UL << SPU_CONTEXT_SWITCH_ACTIVE_nr)
+#define SPU_CONTEXT_SWITCH_PENDING     0UL
+#define SPU_CONTEXT_SWITCH_ACTIVE      1UL
 
 struct spu_context;
 struct spu_runqueue;