[PATCH] sysctl: use bitmap library functions

[Akinobu Mita <akinobu.mita@gmail.com>]

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 was unnecessary.

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

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
 kernel/sysctl.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index f487f25..57c92a7 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -58,6 +58,7 @@
 #include <linux/oom.h>
 #include <linux/kmod.h>
 #include <linux/capability.h>
+#include <linux/bitmap.h>
 
 #include <asm/uaccess.h>
 #include <asm/processor.h>
@@ -2884,9 +2885,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
 				}
 			}
 
-			while (val_a <= val_b)
-				set_bit(val_a++, tmp_bitmap);
-
+			bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1);
 			first = 0;
 			proc_skip_char(&kbuf, &left, '\n');
 		}
@@ -2929,8 +2928,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
 			if (*ppos)
 				bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len);
 			else
-				memcpy(bitmap, tmp_bitmap,
-					BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long));
+				bitmap_copy(bitmap, tmp_bitmap, bitmap_len);
 		}
 		kfree(tmp_bitmap);
 		*lenp -= left;
-- 
1.7.4.4