swap: Add flag to identify block swap devices

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Added SWP_BLKDEV flag to distinguish block and regular file backed
swap devices. We could also check if a swap is entire block device,
rather than a file, by:
S_ISBLK(swap_info_struct->swap_file->f_mapping->host->i_mode)
but, I think, simply checking this flag is more convenient.

Signed-off-by: Nitin Gupta <ngupta@vflare.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Nigel Cunningham <nigel@tuxonice.net>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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Nitin Gupta 2010-05-17 11:02:42 +05:30 • committed by Greg Kroah-Hartman

parent f4a68b9388

commit b272564395

2 changed files with 2 additions and 0 deletions

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1

include/linux/swap.h

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1

mm/swapfile.c

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