erofs: don't align offset for erofs_read_metabuf() (simple cases)

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Most of the callers of erofs_read_metabuf() have the following form:

	block = erofs_blknr(sb, offset);
	off = erofs_blkoff(sb, offset);
	p = erofs_read_metabuf(...., erofs_pos(sb, block), ...);
	if (IS_ERR(p))
		return PTR_ERR(p);
	q = p + off;
	// no further uses of p, block or off.

The value passed to erofs_read_metabuf() is offset rounded down to block
size, i.e. offset - off.  Passing offset as-is would increase the return
value by off in case of success and keep the return value unchanged in
in case of error.  In other words, the same could be achieved by

	q = erofs_read_metabuf(...., offset, ...);
	if (IS_ERR(q))
		return PTR_ERR(q);

This commit convert these simple cases.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/20240425195915.GD1031757@ZenIV
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

...

This commit is contained in:

Al Viro 2024-04-25 20:59:15 +01:00 • committed by Gao Xiang

parent e09815446d

commit 076d965eb8

4 changed files with 14 additions and 25 deletions

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11

fs/erofs/data.c

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12

fs/erofs/fscache.c

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8

fs/erofs/super.c

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8

fs/erofs/zmap.c

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