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ext4: allow a NULL argument to ext4_ext_drop_refs()

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Teach ext4_ext_drop_refs() to accept a NULL argument, much like
kfree().  This allows us to drop a lot of checks to make sure path is
non-NULL before calling ext4_ext_drop_refs().

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2014-09-01 14:39:09 -04:00
parent 523f431ccf
commit b7ea89ad0a
4 changed files with 29 additions and 51 deletions
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6
fs/ext4/migrate.c
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@@ -84,10 +84,8 @@ static int finish_range(handle_t *handle, struct inode *inode,
retval = ext4_ext_insert_extent(handle, inode, &path, &newext, 0);
err_out:
up_write((&EXT4_I(inode)->i_data_sem));
if (path) {
ext4_ext_drop_refs(path);
kfree(path);
}
ext4_ext_drop_refs(path);
kfree(path);
lb->first_pblock = 0;
return retval;
}