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sysctl: use bitmap library functions

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Use bitmap_set() instead of using set_bit() for each bit.  This conversion
is valid because the bitmap is private in the function call and atomic
bitops were unnecessary.

This also includes minor change.
- Use bitmap_copy() for shorter typing

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Akinobu Mita 2012-03-28 14:42:50 -07:00 committed by Linus Torvalds
parent 423a5bb49e
commit 5a04cca6c3
1 changed files with 3 additions and 5 deletions
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8
kernel/sysctl.c
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@ -23,6 +23,7 @@
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/sysctl.h> #include <linux/sysctl.h>
#include <linux/bitmap.h>
#include <linux/signal.h> #include <linux/signal.h>
#include <linux/printk.h> #include <linux/printk.h>
#include <linux/proc_fs.h> #include <linux/proc_fs.h>
@ -2393,9 +2394,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
} }
} }
while (val_a <= val_b) bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1);
set_bit(val_a++, tmp_bitmap);
first = 0; first = 0;
proc_skip_char(&kbuf, &left, '\n'); proc_skip_char(&kbuf, &left, '\n');
} }
@ -2438,8 +2437,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
if (*ppos) if (*ppos)
bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len);
else else
memcpy(bitmap, tmp_bitmap, bitmap_copy(bitmap, tmp_bitmap, bitmap_len);
BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long));
} }
kfree(tmp_bitmap); kfree(tmp_bitmap);
*lenp -= left; *lenp -= left;