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Diffstat (limited to 'arch/ia64/kernel/perfmon.c')
-rw-r--r--arch/ia64/kernel/perfmon.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index c1ad27de2dd2..71d05133f556 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -5013,12 +5013,13 @@ pfm_context_force_terminate(pfm_context_t *ctx, struct pt_regs *regs)
5013} 5013}
5014 5014
5015static int pfm_ovfl_notify_user(pfm_context_t *ctx, unsigned long ovfl_pmds); 5015static int pfm_ovfl_notify_user(pfm_context_t *ctx, unsigned long ovfl_pmds);
5016
5016 /* 5017 /*
5017 * pfm_handle_work() can be called with interrupts enabled 5018 * pfm_handle_work() can be called with interrupts enabled
5018 * (TIF_NEED_RESCHED) or disabled. The down_interruptible 5019 * (TIF_NEED_RESCHED) or disabled. The down_interruptible
5019 * call may sleep, therefore we must re-enable interrupts 5020 * call may sleep, therefore we must re-enable interrupts
5020 * to avoid deadlocks. It is safe to do so because this function 5021 * to avoid deadlocks. It is safe to do so because this function
5021 * is called ONLY when returning to user level (PUStk=1), in which case 5022 * is called ONLY when returning to user level (pUStk=1), in which case
5022 * there is no risk of kernel stack overflow due to deep 5023 * there is no risk of kernel stack overflow due to deep
5023 * interrupt nesting. 5024 * interrupt nesting.
5024 */ 5025 */
@@ -5034,7 +5035,8 @@ pfm_handle_work(void)
5034 5035
5035 ctx = PFM_GET_CTX(current); 5036 ctx = PFM_GET_CTX(current);
5036 if (ctx == NULL) { 5037 if (ctx == NULL) {
5037 printk(KERN_ERR "perfmon: [%d] has no PFM context\n", task_pid_nr(current)); 5038 printk(KERN_ERR "perfmon: [%d] has no PFM context\n",
5039 task_pid_nr(current));
5038 return; 5040 return;
5039 } 5041 }
5040 5042
@@ -5058,11 +5060,12 @@ pfm_handle_work(void)
5058 /* 5060 /*
5059 * must be done before we check for simple-reset mode 5061 * must be done before we check for simple-reset mode
5060 */ 5062 */
5061 if (ctx->ctx_fl_going_zombie || ctx->ctx_state == PFM_CTX_ZOMBIE) goto do_zombie; 5063 if (ctx->ctx_fl_going_zombie || ctx->ctx_state == PFM_CTX_ZOMBIE)
5062 5064 goto do_zombie;
5063 5065
5064 //if (CTX_OVFL_NOBLOCK(ctx)) goto skip_blocking; 5066 //if (CTX_OVFL_NOBLOCK(ctx)) goto skip_blocking;
5065 if (reason == PFM_TRAP_REASON_RESET) goto skip_blocking; 5067 if (reason == PFM_TRAP_REASON_RESET)
5068 goto skip_blocking;
5066 5069
5067 /* 5070 /*
5068 * restore interrupt mask to what it was on entry. 5071 * restore interrupt mask to what it was on entry.
@@ -5110,7 +5113,8 @@ do_zombie:
5110 /* 5113 /*
5111 * in case of interruption of down() we don't restart anything 5114 * in case of interruption of down() we don't restart anything
5112 */ 5115 */
5113 if (ret < 0) goto nothing_to_do; 5116 if (ret < 0)
5117 goto nothing_to_do;
5114 5118
5115skip_blocking: 5119skip_blocking:
5116 pfm_resume_after_ovfl(ctx, ovfl_regs, regs); 5120 pfm_resume_after_ovfl(ctx, ovfl_regs, regs);