On Saturday, 15 of December 2007, Rafael J. Wysocki wrote:
> On Saturday, 15 of December 2007, Chuck Ebbert wrote:
> > On 12/14/2007 08:52 PM, Rafael J. Wysocki wrote:
> > > On Saturday, 15 of December 2007, Chuck Ebbert wrote:
> > >> On 12/14/2007 02:49 PM, Greg Kroah-Hartman wrote:
> > >>> Freezer: Fix APM emulation breakage
> > >> drivers/char/apm-emulation.c: In function 'apm_ioctl':
> > >> drivers/char/apm-emulation.c:370: error: implicit declaration of function 'wait_event_freezable'
> > >> make[2]: *** [drivers/char/apm-emulation.o] Error 1
> > >> make[1]: *** [drivers/char] Error 2
> > >
> > > This is my fault, sorry.
> > >
> > > I though the 2.6.24-rc fix would be suitable for 2.6.23.x, but that's not the
> > > case.
> > >
> > > Greg, please revert the "Freezer: Fix APM emulation breakage" patch, I'll
> > > prepare a separate fix suitable for -stable.
> > >
> >
> > It works if you add the changes to freezer.h made in commit
> > e42837bcd35b75bb59ae5d3e62f87be1aeeb05c3
>
> Yes, exactly, but a new patch is needed anyway.
>
> Hmm, perhaps it's better to add a new patch on top of "Freezer: Fix APM
> emulation breakage"? Would that be preferred?
For convenience, below is the patch that should fix the breakage when applied
on top of the "Freezer: Fix APM emulation breakage" patch.
Thanks,
Rafael
---
From: Rafael J. Wysocki <[email protected]>
This patch is needed to fix the compilation breakage in the
APM emulation driver in 2.6.23.10 caused by the
"Freezer: Fix APM emulation breakage" patch.
The changes introduced by this patch are already in the
mainline (commit e42837bcd35b75bb59ae5d3e62f87be1aeeb05c3).
Signed-off-by: Rafael J. Wysocki <[email protected]>
---
include/linux/freezer.h | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
Index: linux-2.6.23.y/include/linux/freezer.h
===================================================================
--- linux-2.6.23.y.orig/include/linux/freezer.h
+++ linux-2.6.23.y/include/linux/freezer.h
@@ -4,6 +4,7 @@
#define FREEZER_H_INCLUDED
#include <linux/sched.h>
+#include <linux/wait.h>
#ifdef CONFIG_PM_SLEEP
/*
@@ -126,6 +127,36 @@ static inline void set_freezable(void)
current->flags &= ~PF_NOFREEZE;
}
+/*
+ * Freezer-friendly wrappers around wait_event_interruptible() and
+ * wait_event_interruptible_timeout(), originally defined in <linux/wait.h>
+ */
+
+#define wait_event_freezable(wq, condition) \
+({ \
+ int __retval; \
+ do { \
+ __retval = wait_event_interruptible(wq, \
+ (condition) || freezing(current)); \
+ if (__retval && !freezing(current)) \
+ break; \
+ else if (!(condition)) \
+ __retval = -ERESTARTSYS; \
+ } while (try_to_freeze()); \
+ __retval; \
+})
+
+
+#define wait_event_freezable_timeout(wq, condition, timeout) \
+({ \
+ long __retval = timeout; \
+ do { \
+ __retval = wait_event_interruptible_timeout(wq, \
+ (condition) || freezing(current), \
+ __retval); \
+ } while (try_to_freeze()); \
+ __retval; \
+})
#else /* !CONFIG_PM_SLEEP */
static inline int frozen(struct task_struct *p) { return 0; }
static inline int freezing(struct task_struct *p) { return 0; }
@@ -143,6 +174,13 @@ static inline void freezer_do_not_count(
static inline void freezer_count(void) {}
static inline int freezer_should_skip(struct task_struct *p) { return 0; }
static inline void set_freezable(void) {}
+
+#define wait_event_freezable(wq, condition) \
+ wait_event_interruptible(wq, condition)
+
+#define wait_event_freezable_timeout(wq, condition, timeout) \
+ wait_event_interruptible_timeout(wq, condition, timeout)
+
#endif /* !CONFIG_PM_SLEEP */
#endif /* FREEZER_H_INCLUDED */
--
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