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Commit 595dd3d8 authored by Randy Dunlap's avatar Randy Dunlap Committed by David Woodhouse
Browse files

kmsg_dump: fix build for CONFIG_PRINTK=n 



kmsg_dump() fails to build when CONFIG_PRINTK=n; provide stubs
for the kmsg_dump*() functions when CONFIG_PRINTK=n.

kernel/printk.c: In function 'kmsg_dump':
kernel/printk.c:1501: error: 'log_buf_len' undeclared (first use in this function)
kernel/printk.c:1502: error: 'logged_chars' undeclared (first use in this function)
kernel/printk.c:1506: error: 'log_buf' undeclared (first use in this function)

Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
Acked-by: default avatarSimon Kagstrom <simon.kagstrom@netinsight.net>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 75352662

include/linux/kmsg_dump.h

+16 −0
Original line number Diff line number Diff line
@@ -35,10 +35,26 @@ struct kmsg_dumper { 
	int registered;

};



#ifdef CONFIG_PRINTK

void kmsg_dump(enum kmsg_dump_reason reason);



int kmsg_dump_register(struct kmsg_dumper *dumper);



int kmsg_dump_unregister(struct kmsg_dumper *dumper);

#else

static inline void kmsg_dump(enum kmsg_dump_reason reason)

{

}



static inline int kmsg_dump_register(struct kmsg_dumper *dumper)

{

	return -EINVAL;

}



static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper)

{

	return -EINVAL;

}

#endif



#endif /* _LINUX_KMSG_DUMP_H */

kernel/printk.c

+1 −1
Original line number Diff line number Diff line
@@ -1405,7 +1405,6 @@ bool printk_timed_ratelimit(unsigned long *caller_jiffies, 
	return false;

}

EXPORT_SYMBOL(printk_timed_ratelimit);

#endif



static DEFINE_SPINLOCK(dump_list_lock);

static LIST_HEAD(dump_list);
@@ -1524,3 +1523,4 @@ void kmsg_dump(enum kmsg_dump_reason reason) 
		dumper->dump(dumper, reason, s1, l1, s2, l2);

	spin_unlock_irqrestore(&dump_list_lock, flags);

}

#endif