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xfs: clean up bufsize alignment in xfs_ioc_attr_list

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Use the round_down macro, and use the size of the uint32 type we
use in the callback that fills the buffer to make the code a little
more clear - the size of it is always the same as int for platforms
that Linux runs on.

Suggested-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2020-02-26 17:30:44 -08:00 committed by Darrick J. Wong
parent e3a19cdea8
commit f311d771a0
1 changed files with 1 additions and 1 deletions
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2
fs/xfs/xfs_ioctl.c
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@ -415,7 +415,7 @@ xfs_ioc_attr_list(
context.resynch = 1; context.resynch = 1;
context.attr_filter = xfs_attr_filter(flags); context.attr_filter = xfs_attr_filter(flags);
context.buffer = buffer; context.buffer = buffer;
context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */ context.bufsize = round_down(bufsize, sizeof(uint32_t));
context.firstu = context.bufsize; context.firstu = context.bufsize;
context.put_listent = xfs_ioc_attr_put_listent; context.put_listent = xfs_ioc_attr_put_listent;