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05 April 2024, 19:05:47 UTC
Revision 50ac2d694f2dd1658341cf97bcf2ffb836d772cb authored by Alexey Dobriyan on 12 August 2008, 22:09:02 UTC, committed by Linus Torvalds on 12 August 2008, 23:07:30 UTC 
seq_file: add seq_cpumask(), seq_nodemask()
 
Short enough reads from /proc/irq/*/smp_affinity return -EINVAL for no
good reason.

This became noticed with NR_CPUS=4096 patches, when length of printed
representation of cpumask becase 1152, but cat(1) continued to read with
1024-byte chunks.  bitmap_scnprintf() in good faith fills buffer, returns
1023, check returns -EINVAL.

Fix it by switching to seq_file, so handler will just fill buffer and
doesn't care about offsets, length, filling EOF and all this crap.

For that add seq_bitmap(), and wrappers around it -- seq_cpumask() and
seq_nodemask().

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Paul Jackson <pj@sgi.com>
Cc: Mike Travis <travis@sgi.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent dd76346
History
Tip revision: 50ac2d694f2dd1658341cf97bcf2ffb836d772cb authored by Alexey Dobriyan on 12 August 2008, 22:09:02 UTC
seq_file: add seq_cpumask(), seq_nodemask()
Tip revision: 50ac2d6
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