Commit d8bd504a authored by Steven Whitehouse's avatar Steven Whitehouse
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GFS2: Fix bug in block allocation 



The new bitfit algorithm was counting from the wrong end of
64 bit words in the bitfield. This fixes it by using __ffs64
instead of fls64

Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
parent 952043ac

fs/gfs2/rgrp.c

+1 −2
Original line number Diff line number Diff line
@@ -212,8 +212,7 @@ static u32 gfs2_bitfit(const u8 *buf, const unsigned int len, 
	if (tmp == 0)

		return BFITNOENT;

	ptr--;

	bit = fls64(tmp);

	bit--;		/* fls64 always adds one to the bit count */

	bit = __ffs64(tmp);

	bit /= 2;	/* two bits per entry in the bitmap */

	return (((const unsigned char *)ptr - buf) * GFS2_NBBY) + bit;

}