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Message-ID: <20090214003210.GB22590@x200.localdomain>
Date: Sat, 14 Feb 2009 03:32:10 +0300
From: Alexey Dobriyan <adobriyan@...il.com>
To: torvalds@...ux-foundation.org
Cc: akpm@...ux-foundation.org, mingo@...e.hu,
linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
srostedt@...hat.com
Subject: Re: irqflags.h changes
On Sat, Feb 14, 2009 at 03:23:24AM +0300, Alexey Dobriyan wrote:
> Currently, linux/irqflags.h defines local_irq_enable() and friends
> through raw_* counterparts.
>
> Sometimes it defines raw_* counterparts through local_irq_enable() and
> friends.
>
> I'm going to end this subtle joke and make on all archs:
>
> local_irq_enable() via raw_local_irq_enable()
> local_irq_disable() via raw_local_irq_disable()
> local_irq_save() via raw_local_irq_save()
> local_irq_restore() via raw_local_irq_restore() + stuff
> local_save_flags() via raw_local_save_flags()
> irqs_disabled() via raw_irqs_disabled_flags() + stuff
>
> linux/irqflags.h will include asm/irqflags.h unconditionally.
> Arches that don't have asm/irqflags.h will get it through extraction
> from asm/system.h or whatever.
>
> Users will just include <linux/irqflags.h>
>
> Irq tracing will remain the same (it's nop depending on config option,
> after all).
>
> Typechecking will be preserved.
>
> Compilation will be fixed.
>
> And possibly changing some defines into static inlines.
>
> OK?
>
>
> All of this is orthogonal to irq_flags_t stuff, but I'd like to do this
> first.
>
> Below is patch for alpha and fallout:
New patch with asm/irqflags.h actually included:
arch/alpha/include/asm/io.h | 1
arch/alpha/include/asm/irqflags.h | 14 ++++++
arch/alpha/include/asm/system.h | 8 ---
drivers/base/devres.c | 1
drivers/input/joystick/gamecon.c | 1
include/linux/irqflags.h | 81 +++++++++++++++-----------------------
include/linux/kfifo.h | 1
include/linux/proportions.h | 1
include/linux/spinlock_api_up.h | 2
include/linux/spinlock_up.h | 2
kernel/notifier.c | 1
kernel/params.c | 1
kernel/smp.c | 1
lib/idr.c | 1
lib/ratelimit.c | 1
mm/internal.h | 1
mm/page_isolation.c | 2
17 files changed, 63 insertions(+), 57 deletions(-)
diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h
index eda9b90..b435d35 100644
--- a/arch/alpha/include/asm/io.h
+++ b/arch/alpha/include/asm/io.h
@@ -3,6 +3,7 @@
#ifdef __KERNEL__
+#include <linux/irqflags.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <asm/compiler.h>
diff --git a/arch/alpha/include/asm/irqflags.h b/arch/alpha/include/asm/irqflags.h
new file mode 100644
index 0000000..dd3946c
--- /dev/null
+++ b/arch/alpha/include/asm/irqflags.h
@@ -0,0 +1,14 @@
+#ifndef __ALPHA_IRQFLAGS_H
+#define __ALPHA_IRQFLAGS_H
+#include <asm/system.h>
+
+#define raw_local_irq_disable() do { setipl(IPL_MAX); barrier(); } while(0)
+#define raw_local_irq_enable() do { barrier(); setipl(IPL_MIN); } while(0)
+#define raw_local_save_flags(flags) ((flags) = rdps())
+#define raw_local_irq_save(flags) do { (flags) = swpipl(IPL_MAX); barrier(); } while(0)
+#define raw_local_irq_restore(flags) do { barrier(); setipl(flags); barrier(); } while(0)
+
+#define raw_irqs_disabled() (getipl() == IPL_MAX)
+#define raw_irqs_disabled_flags(flags) ((flags) == IPL_MAX)
+
+#endif
diff --git a/arch/alpha/include/asm/system.h b/arch/alpha/include/asm/system.h
index afe20fa..6384be8 100644
--- a/arch/alpha/include/asm/system.h
+++ b/arch/alpha/include/asm/system.h
@@ -279,14 +279,6 @@ extern int __min_ipl;
#define getipl() (rdps() & 7)
#define setipl(ipl) ((void) swpipl(ipl))
-#define local_irq_disable() do { setipl(IPL_MAX); barrier(); } while(0)
-#define local_irq_enable() do { barrier(); setipl(IPL_MIN); } while(0)
-#define local_save_flags(flags) ((flags) = rdps())
-#define local_irq_save(flags) do { (flags) = swpipl(IPL_MAX); barrier(); } while(0)
-#define local_irq_restore(flags) do { barrier(); setipl(flags); barrier(); } while(0)
-
-#define irqs_disabled() (getipl() == IPL_MAX)
-
/*
* TB routines..
*/
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index e8beb8e..a145055 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -8,6 +8,7 @@
*/
#include <linux/device.h>
+#include <linux/irqflags.h>
#include <linux/module.h>
#include "base.h"
diff --git a/drivers/input/joystick/gamecon.c b/drivers/input/joystick/gamecon.c
index 07a32af..3a97bd5 100644
--- a/drivers/input/joystick/gamecon.c
+++ b/drivers/input/joystick/gamecon.c
@@ -34,6 +34,7 @@
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/irqflags.h>
#include <linux/parport.h>
#include <linux/input.h>
#include <linux/mutex.h>
diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h
index 74bde13..820642c 100644
--- a/include/linux/irqflags.h
+++ b/include/linux/irqflags.h
@@ -52,14 +52,20 @@
# define start_critical_timings() do { } while (0)
#endif
-#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
-
#include <asm/irqflags.h>
-#define local_irq_enable() \
- do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0)
-#define local_irq_disable() \
- do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0)
+static inline void local_irq_enable(void)
+{
+ trace_hardirqs_on();
+ raw_local_irq_enable();
+}
+
+static inline void local_irq_disable(void)
+{
+ raw_local_irq_disable();
+ trace_hardirqs_off();
+}
+
#define local_irq_save(flags) \
do { \
typecheck(unsigned long, flags); \
@@ -68,35 +74,16 @@
} while (0)
-#define local_irq_restore(flags) \
- do { \
- typecheck(unsigned long, flags); \
- if (raw_irqs_disabled_flags(flags)) { \
- raw_local_irq_restore(flags); \
- trace_hardirqs_off(); \
- } else { \
- trace_hardirqs_on(); \
- raw_local_irq_restore(flags); \
- } \
- } while (0)
-#else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */
-/*
- * The local_irq_*() APIs are equal to the raw_local_irq*()
- * if !TRACE_IRQFLAGS.
- */
-# define raw_local_irq_disable() local_irq_disable()
-# define raw_local_irq_enable() local_irq_enable()
-# define raw_local_irq_save(flags) \
- do { \
- typecheck(unsigned long, flags); \
- local_irq_save(flags); \
- } while (0)
-# define raw_local_irq_restore(flags) \
- do { \
- typecheck(unsigned long, flags); \
- local_irq_restore(flags); \
- } while (0)
-#endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */
+static inline void local_irq_restore(unsigned long flags)
+{
+ if (raw_irqs_disabled_flags(flags)) {
+ raw_local_irq_restore(flags);
+ trace_hardirqs_off();
+ } else {
+ trace_hardirqs_on();
+ raw_local_irq_restore(flags);
+ }
+}
#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
#define safe_halt() \
@@ -104,6 +91,7 @@
trace_hardirqs_on(); \
raw_safe_halt(); \
} while (0)
+#endif
#define local_save_flags(flags) \
do { \
@@ -111,19 +99,16 @@
raw_local_save_flags(flags); \
} while (0)
-#define irqs_disabled() \
-({ \
- unsigned long _flags; \
- \
- raw_local_save_flags(_flags); \
- raw_irqs_disabled_flags(_flags); \
-})
+static inline int irqs_disabled(void)
+{
+ unsigned long flags;
-#define irqs_disabled_flags(flags) \
-({ \
- typecheck(unsigned long, flags); \
- raw_irqs_disabled_flags(flags); \
-})
-#endif /* CONFIG_X86 */
+ raw_local_save_flags(flags);
+ return raw_irqs_disabled_flags(flags);
+}
+static inline int irqs_disabled_flags(unsigned long flags)
+{
+ return raw_irqs_disabled_flags(flags);
+}
#endif
diff --git a/include/linux/kfifo.h b/include/linux/kfifo.h
index 29f62e1..e0953cc 100644
--- a/include/linux/kfifo.h
+++ b/include/linux/kfifo.h
@@ -22,6 +22,7 @@
#define _LINUX_KFIFO_H
#include <linux/kernel.h>
+#include <linux/irqflags.h>
#include <linux/spinlock.h>
struct kfifo {
diff --git a/include/linux/proportions.h b/include/linux/proportions.h
index cf793bb..3eaf516 100644
--- a/include/linux/proportions.h
+++ b/include/linux/proportions.h
@@ -9,6 +9,7 @@
#ifndef _LINUX_PROPORTIONS_H
#define _LINUX_PROPORTIONS_H
+#include <linux/irqflags.h>
#include <linux/percpu_counter.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>
diff --git a/include/linux/spinlock_api_up.h b/include/linux/spinlock_api_up.h
index 04e1d31..4f8fbde 100644
--- a/include/linux/spinlock_api_up.h
+++ b/include/linux/spinlock_api_up.h
@@ -5,6 +5,8 @@
# error "please don't include this file directly"
#endif
+#include <linux/irqflags.h>
+
/*
* include/linux/spinlock_api_up.h
*
diff --git a/include/linux/spinlock_up.h b/include/linux/spinlock_up.h
index 938234c..d162b4a 100644
--- a/include/linux/spinlock_up.h
+++ b/include/linux/spinlock_up.h
@@ -18,6 +18,8 @@
*/
#ifdef CONFIG_DEBUG_SPINLOCK
+#include <linux/irqflags.h>
+
#define __raw_spin_is_locked(x) ((x)->slock == 0)
static inline void __raw_spin_lock(raw_spinlock_t *lock)
diff --git a/kernel/notifier.c b/kernel/notifier.c
index 61d5aa5..a22ea41 100644
--- a/kernel/notifier.c
+++ b/kernel/notifier.c
@@ -1,3 +1,4 @@
+#include <linux/irqflags.h>
#include <linux/kdebug.h>
#include <linux/kprobes.h>
#include <linux/module.h>
diff --git a/kernel/params.c b/kernel/params.c
index a1e3025..5eaf15b 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -19,6 +19,7 @@
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
+#include <linux/irqflags.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/err.h>
diff --git a/kernel/smp.c b/kernel/smp.c
index bbedbb7..d9b5e1c 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -5,6 +5,7 @@
*
*/
#include <linux/init.h>
+#include <linux/irqflags.h>
#include <linux/module.h>
#include <linux/percpu.h>
#include <linux/rcupdate.h>
diff --git a/lib/idr.c b/lib/idr.c
index c11c576..b3fe4e6 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -29,6 +29,7 @@
#ifndef TEST // to test in user space...
#include <linux/slab.h>
#include <linux/init.h>
+#include <linux/irqflags.h>
#include <linux/module.h>
#endif
#include <linux/err.h>
diff --git a/lib/ratelimit.c b/lib/ratelimit.c
index 26187ed..eb528f0 100644
--- a/lib/ratelimit.c
+++ b/lib/ratelimit.c
@@ -11,6 +11,7 @@
*/
#include <linux/kernel.h>
+#include <linux/irqflags.h>
#include <linux/jiffies.h>
#include <linux/module.h>
diff --git a/mm/internal.h b/mm/internal.h
index 478223b..163419b 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -11,6 +11,7 @@
#ifndef __MM_INTERNAL_H
#define __MM_INTERNAL_H
+#include <linux/irqflags.h>
#include <linux/mm.h>
void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 5e0ffd9..2f4b396 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -1,7 +1,7 @@
/*
* linux/mm/page_isolation.c
*/
-
+#include <linux/irqflags.h>
#include <linux/mm.h>
#include <linux/page-isolation.h>
#include <linux/pageblock-flags.h>
--
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