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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2008-08-12 15:09:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-08-12 16:07:30 -0700 |
| commit | 50ac2d694f2dd1658341cf97bcf2ffb836d772cb (patch) | |
| tree | c4466ecb7c5211ee9423380783f00027411d5d5a /include/linux/bitmap.h | |
| parent | dd763460eb628b57814251a15a39f8d75c044d76 (diff) | |
| download | op-kernel-dev-50ac2d694f2dd1658341cf97bcf2ffb836d772cb.zip op-kernel-dev-50ac2d694f2dd1658341cf97bcf2ffb836d772cb.tar.gz | |
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>
Diffstat (limited to 'include/linux/bitmap.h')
| -rw-r--r-- | include/linux/bitmap.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 1abfe66..89781fd 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -110,6 +110,7 @@ extern int __bitmap_weight(const unsigned long *bitmap, int bits); extern int bitmap_scnprintf(char *buf, unsigned int len, const unsigned long *src, int nbits); +extern int bitmap_scnprintf_len(unsigned int nr_bits); extern int __bitmap_parse(const char *buf, unsigned int buflen, int is_user, unsigned long *dst, int nbits); extern int bitmap_parse_user(const char __user *ubuf, unsigned int ulen, |
