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authorFrederic Weisbecker <fweisbec@gmail.com>2013-03-22 15:04:39 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-03-22 16:41:20 -0700
commitdc72c32e1fd872a9a4fdfe645283c9dcd68e556d (patch)
tree66f817ecb840f59173de2a95a9a69fb5c3a75d21 /lib
parentfe8d52614bd419cedef85ef55850fd090373f481 (diff)
downloadvexpress-lsk-dc72c32e1fd872a9a4fdfe645283c9dcd68e556d.tar.gz
printk: Provide a wake_up_klogd() off-case
wake_up_klogd() is useless when CONFIG_PRINTK=n because neither printk() nor printk_sched() are in use and there are actually no waiter on log_wait waitqueue. It should be a stub in this case for users like bust_spinlocks(). Otherwise this results in this warning when CONFIG_PRINTK=n and CONFIG_IRQ_WORK=n: kernel/built-in.o In function `wake_up_klogd': (.text.wake_up_klogd+0xb4): undefined reference to `irq_work_queue' To fix this, provide an off-case for wake_up_klogd() when CONFIG_PRINTK=n. There is much more from console_unlock() and other console related code in printk.c that should be moved under CONFIG_PRINTK. But for now, focus on a minimal fix as we passed the merged window already. [akpm@linux-foundation.org: include printk.h in bust_spinlocks.c] Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Reported-by: James Hogan <james.hogan@imgtec.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/bust_spinlocks.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/lib/bust_spinlocks.c b/lib/bust_spinlocks.c
index 9681d54b95d..f8e0e536739 100644
--- a/lib/bust_spinlocks.c
+++ b/lib/bust_spinlocks.c
@@ -8,6 +8,7 @@
*/
#include <linux/kernel.h>
+#include <linux/printk.h>
#include <linux/spinlock.h>
#include <linux/tty.h>
#include <linux/wait.h>
@@ -28,5 +29,3 @@ void __attribute__((weak)) bust_spinlocks(int yes)
wake_up_klogd();
}
}
-
-