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block: kill swap_io_context()

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It blindly copies everything in the io_context, including the lock.
That doesn't work so well for either lock ordering or lockdep.

There seems zero point in swapping io contexts on a request to request
merge, so the best point of action is to just remove it.

Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jens Axboe 2008-02-01 11:34:49 +01:00
commit 3bc217ffe6
3 changed files with 0 additions and 24 deletions
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9
block/blk-ioc.c
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@ -176,15 +176,6 @@ void copy_io_context(struct io_context **pdst, struct io_context **psrc)
}
EXPORT_SYMBOL(copy_io_context);
void swap_io_context(struct io_context **ioc1, struct io_context **ioc2)
{
struct io_context *temp;
temp = *ioc1;
*ioc1 = *ioc2;
*ioc2 = temp;
}
EXPORT_SYMBOL(swap_io_context);
int __init blk_ioc_init(void)
{
iocontext_cachep = kmem_cache_create("blkdev_ioc",