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buffer: make touch_buffer() an exported function
We want to add a trace point to touch_buffer() but macros and inline functions defined in header files can't have tracing points. Move touch_buffer() to fs/buffer.c and make it a proper function. The new exported function is also declared inline. As most uses of touch_buffer() are inside buffer.c with nilfs2 as the only other user, the effect of this change should be negligible. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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2 changed files with 7 additions and 1 deletions
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@ -53,6 +53,12 @@ void init_buffer(struct buffer_head *bh, bh_end_io_t *handler, void *private)
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}
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EXPORT_SYMBOL(init_buffer);
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inline void touch_buffer(struct buffer_head *bh)
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{
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mark_page_accessed(bh->b_page);
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}
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EXPORT_SYMBOL(touch_buffer);
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static int sleep_on_buffer(void *word)
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{
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io_schedule();
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