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[PATCH] blk: light iocontext ops

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get_io_context needlessly turned off interrupts and checked for racing io
context creations.  Both of which aren't needed, because the io context can
only be created while in process context of the current process.

Also, split the function in 2.  A light version, current_io_context does not
elevate the reference count specifically, but can be used when in process
context, because the process holds a reference itself.

Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nick Piggin 2005-06-28 20:45:15 -07:00 • committed by Linus Torvalds
commit fb3cc4320e
2 changed files with 26 additions and 31 deletions
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1
include/linux/blkdev.h
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@ -96,6 +96,7 @@ struct io_context {
void put_io_context(struct io_context *ioc);
void exit_io_context(void);
struct io_context *current_io_context(int gfp_flags);
struct io_context *get_io_context(int gfp_flags);
void copy_io_context(struct io_context **pdst, struct io_context **psrc);
void swap_io_context(struct io_context **ioc1, struct io_context **ioc2);