[IA64] sem2mutex: arch/ia64/kernel/perfmon.c

Migrate perfmon from using an old semaphore to a completion handler.

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 2ea4b39efffa..9c5194b385da 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -40,6 +40,7 @@
 #include <linux/bitops.h>
 #include <linux/capability.h>
 #include <linux/rcupdate.h>
+#include <linux/completion.h>
 
 #include <asm/errno.h>
 #include <asm/intrinsics.h>
@@ -286,7 +287,7 @@ typedef struct pfm_context {
 
         unsigned long           ctx_ovfl_regs[4];       /* which registers overflowed (notification) */
 
-        struct semaphore        ctx_restart_sem;        /* use for blocking notification mode */
+        struct completion       ctx_restart_done;       /* use for blocking notification mode */
 
         unsigned long           ctx_used_pmds[4];       /* bitmask of PMD used            */
         unsigned long           ctx_all_pmds[4];        /* bitmask of all accessible PMDs */
@@ -1991,7 +1992,7 @@ pfm_close(struct inode *inode, struct file *filp)
                 /*
                  * force task to wake up from MASKED state
                  */
-                up(&ctx->ctx_restart_sem);
+                complete(&ctx->ctx_restart_done);
 
                 DPRINT(("waking up ctx_state=%d\n", state));
 
@@ -2706,7 +2707,7 @@ pfm_context_create(pfm_context_t *ctx, void *arg, int count, struct pt_regs *reg
         /*
          * init restart semaphore to locked
          */
-        sema_init(&ctx->ctx_restart_sem, 0);
+        init_completion(&ctx->ctx_restart_done);
 
         /*
          * activation is used in SMP only
@@ -3687,7 +3688,7 @@ pfm_restart(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
          */
         if (CTX_OVFL_NOBLOCK(ctx) == 0 && state == PFM_CTX_MASKED) {
                 DPRINT(("unblocking [%d] \n", task->pid));
-                up(&ctx->ctx_restart_sem);
+                complete(&ctx->ctx_restart_done);
         } else {
                 DPRINT(("[%d] armed exit trap\n", task->pid));
 
@@ -5089,7 +5090,7 @@ pfm_handle_work(void)
          * may go through without blocking on SMP systems
          * if restart has been received already by the time we call down()
          */
-        ret = down_interruptible(&ctx->ctx_restart_sem);
+        ret = wait_for_completion_interruptible(&ctx->ctx_restart_done);
 
         DPRINT(("after block sleeping ret=%d\n", ret));