The patch titled
Subject: irq_work: fix build failure when CONFIG_IRQ_WORK not defined
has been added to the -mm tree. Its filename is
irq_work-fix-build-failure-when-config_irq_work-not-defined.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/irq_work-fix-build-failure-when-config_irq_work-not-defined.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/irq_work-fix-build-failure-when-config_irq_work-not-defined.patch
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------------------------------------------------------
From: Steven Rostedt <rostedt@xxxxxxxxxxx>
Subject: irq_work: fix build failure when CONFIG_IRQ_WORK not defined
When CONFIG_IRQ_WORK is not defined (difficult to do, as it also requires
CONFIG_PRINTK not to be defined), we get a build failure:
kernel/built-in.o: In function `flush_smp_call_function_queue':
kernel/smp.c:263: undefined reference to `irq_work_run'
kernel/smp.c:263: undefined reference to `irq_work_run'
Makefile:933: recipe for target 'vmlinux' failed
Simplest thing to do is to make irq_work_run() a nop when not set.
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/irq_work.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN include/linux/irq_work.h~irq_work-fix-build-failure-when-config_irq_work-not-defined include/linux/irq_work.h
--- a/include/linux/irq_work.h~irq_work-fix-build-failure-when-config_irq_work-not-defined
+++ a/include/linux/irq_work.h
@@ -38,16 +38,17 @@ bool irq_work_queue(struct irq_work *wor
bool irq_work_queue_on(struct irq_work *work, int cpu);
#endif
-void irq_work_run(void);
void irq_work_tick(void);
void irq_work_sync(struct irq_work *work);
#ifdef CONFIG_IRQ_WORK
#include <asm/irq_work.h>
+void irq_work_run(void);
bool irq_work_needs_cpu(void);
#else
static inline bool irq_work_needs_cpu(void) { return false; }
+static inline void irq_work_run(void) { }
#endif
#endif /* _LINUX_IRQ_WORK_H */
_
Patches currently in -mm which might be from rostedt@xxxxxxxxxxx are
mm-memory-failurec-define-page-types-for-action_result-in-one-place.patch
printk-comment-pr_cont-stating-it-is-only-to-continue-a-line.patch
tracing-remove-use-of-seq_printf-return-value.patch
linux-next.patch
irq_work-fix-build-failure-when-config_irq_work-not-defined.patch
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