[PATCH] lockdep: annotate enable_in_hardirq()

Make use of local_irq_enable_in_hardirq() API to annotate places that enable
hardirqs in hardirq context.

Has no effect on non-lockdep kernels.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/kernel/nmi.c

@@ -107,7 +107,7 @@ int nmi_active;
 static __init void nmi_cpu_busy(void *data)
 {
 	volatile int *endflag = data;
-	local_irq_enable();
+	local_irq_enable_in_hardirq();
 	/* Intentionally don't use cpu_relax here. This is
 	   to make sure that the performance counter really ticks,
 	   even if there is a simulator or similar that catches the

arch/x86_64/kernel/nmi.c

@@ -127,7 +127,7 @@ void __cpuinit nmi_watchdog_default(void)
 static __init void nmi_cpu_busy(void *data)
 {
 	volatile int *endflag = data;
-	local_irq_enable();
+	local_irq_enable_in_hardirq();
 	/* Intentionally don't use cpu_relax here. This is
 	   to make sure that the performance counter really ticks,
 	   even if there is a simulator or similar that catches the

drivers/ide/ide-floppy.c

@@ -838,7 +838,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 			"transferred\n", pc->actually_transferred);
 		clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 
-		local_irq_enable();
+		local_irq_enable_in_hardirq();
 
 		if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
 			/* Error detected */

drivers/ide/ide-io.c

@@ -693,7 +693,7 @@ static ide_startstop_t drive_cmd_intr (ide_drive_t *drive)
 	u8 stat = hwif->INB(IDE_STATUS_REG);
 	int retries = 10;
 
-	local_irq_enable();
+	local_irq_enable_in_hardirq();
 	if ((stat & DRQ_STAT) && args && args[3]) {
 		u8 io_32bit = drive->io_32bit;
 		drive->io_32bit = 0;
@@ -1286,7 +1286,7 @@ static void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq)
 		if (masked_irq != IDE_NO_IRQ && hwif->irq != masked_irq)
 			disable_irq_nosync(hwif->irq);
 		spin_unlock(&ide_lock);
-		local_irq_enable();
+		local_irq_enable_in_hardirq();
 			/* allow other IRQs while we start this request */
 		startstop = start_request(drive, rq);
 		spin_lock_irq(&ide_lock);
@@ -1631,7 +1631,7 @@ irqreturn_t ide_intr (int irq, void *dev_id, struct pt_regs *regs)
 	spin_unlock(&ide_lock);
 
 	if (drive->unmask)
-		local_irq_enable();
+		local_irq_enable_in_hardirq();
 	/* service this interrupt, may set handler for next interrupt */
 	startstop = handler(drive);
 	spin_lock_irq(&ide_lock);

drivers/ide/ide-taskfile.c

@@ -222,7 +222,7 @@ ide_startstop_t task_no_data_intr (ide_drive_t *drive)
 	ide_hwif_t *hwif	= HWIF(drive);
 	u8 stat;
 
-	local_irq_enable();
+	local_irq_enable_in_hardirq();
 	if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 		return ide_error(drive, "task_no_data_intr", stat);
 		/* calls ide_end_drive_cmd */

include/linux/ide.h

@@ -1359,7 +1359,7 @@ extern struct semaphore ide_cfg_sem;
  * ide_drive_t->hwif: constant, no locking
  */
 
-#define local_irq_set(flags)	do { local_save_flags((flags)); local_irq_enable(); } while (0)
+#define local_irq_set(flags)	do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
 
 extern struct bus_type ide_bus_type;
 

kernel/irq/handle.c

@@ -132,7 +132,7 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
 	handle_dynamic_tick(action);
 
 	if (!(action->flags & IRQF_DISABLED))
-		local_irq_enable();
+		local_irq_enable_in_hardirq();
 
 	do {
 		ret = action->handler(irq, action->dev_id, regs);