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btrfs: use the correct const function attribute for btrfs_get_num_csums

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The build robot reports

compiler: h8300-linux-gcc (GCC) 9.3.0
   In file included from fs/btrfs/tests/extent-map-tests.c:8:
>> fs/btrfs/tests/../ctree.h:2166:8: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
    2166 | size_t __const btrfs_get_num_csums(void);
         |        ^~~~~~~

The function attribute for const does not follow the expected scheme and
in this case is confused with a const type qualifier.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2020-07-27 17:38:19 +02:00
parent 282dd7d771
commit 604997b4a3
2 changed files with 2 additions and 2 deletions
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2
fs/btrfs/ctree.c
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@ -68,7 +68,7 @@ const char *btrfs_super_csum_driver(u16 csum_type)
btrfs_csums[csum_type].name;
}
size_t __const btrfs_get_num_csums(void)
size_t __attribute_const__ btrfs_get_num_csums(void)
{
return ARRAY_SIZE(btrfs_csums);
}

2
fs/btrfs/ctree.h
View file

@ -2262,7 +2262,7 @@ BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
int btrfs_super_csum_size(const struct btrfs_super_block *s);
const char *btrfs_super_csum_name(u16 csum_type);
const char *btrfs_super_csum_driver(u16 csum_type);
size_t __const btrfs_get_num_csums(void);
size_t __attribute_const__ btrfs_get_num_csums(void);
/*