fs/ocfs2/dir.c | 12 +----------- fs/ocfs2/refcounttree.c | 13 +++---------- fs/ocfs2/xattr.c | 15 +++------------ 3 files changed, 7 insertions(+), 33 deletions(-)
The custom swap functions used in ocfs2 do not perform any special
operations and can be replaced with the built-in swap function of sort.
This change not only reduces code size but also improves efficiency,
especially in scenarios where CONFIG_RETPOLINE is enabled, as it makes
indirect function calls more expensive.
By using the built-in swap, we avoid these costly indirect function
calls, leading to better performance.
Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
---
Note: Build test only.
fs/ocfs2/dir.c | 12 +-----------
fs/ocfs2/refcounttree.c | 13 +++----------
fs/ocfs2/xattr.c | 15 +++------------
3 files changed, 7 insertions(+), 33 deletions(-)
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index f0beb173dbba..fa5d0819a997 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -3511,16 +3511,6 @@ static int dx_leaf_sort_cmp(const void *a, const void *b)
return 0;
}
-static void dx_leaf_sort_swap(void *a, void *b, int size)
-{
- struct ocfs2_dx_entry *entry1 = a;
- struct ocfs2_dx_entry *entry2 = b;
-
- BUG_ON(size != sizeof(*entry1));
-
- swap(*entry1, *entry2);
-}
-
static int ocfs2_dx_leaf_same_major(struct ocfs2_dx_leaf *dx_leaf)
{
struct ocfs2_dx_entry_list *dl_list = &dx_leaf->dl_list;
@@ -3781,7 +3771,7 @@ static int ocfs2_dx_dir_rebalance(struct ocfs2_super *osb, struct inode *dir,
*/
sort(dx_leaf->dl_list.de_entries, num_used,
sizeof(struct ocfs2_dx_entry), dx_leaf_sort_cmp,
- dx_leaf_sort_swap);
+ NULL);
ocfs2_journal_dirty(handle, dx_leaf_bh);
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 1f303b1adf1a..4f85508538fc 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -1392,13 +1392,6 @@ static int cmp_refcount_rec_by_cpos(const void *a, const void *b)
return 0;
}
-static void swap_refcount_rec(void *a, void *b, int size)
-{
- struct ocfs2_refcount_rec *l = a, *r = b;
-
- swap(*l, *r);
-}
-
/*
* The refcount cpos are ordered by their 64bit cpos,
* But we will use the low 32 bit to be the e_cpos in the b-tree.
@@ -1474,7 +1467,7 @@ static int ocfs2_divide_leaf_refcount_block(struct buffer_head *ref_leaf_bh,
*/
sort(&rl->rl_recs, le16_to_cpu(rl->rl_used),
sizeof(struct ocfs2_refcount_rec),
- cmp_refcount_rec_by_low_cpos, swap_refcount_rec);
+ cmp_refcount_rec_by_low_cpos, NULL);
ret = ocfs2_find_refcount_split_pos(rl, &cpos, &split_index);
if (ret) {
@@ -1499,11 +1492,11 @@ static int ocfs2_divide_leaf_refcount_block(struct buffer_head *ref_leaf_bh,
sort(&rl->rl_recs, le16_to_cpu(rl->rl_used),
sizeof(struct ocfs2_refcount_rec),
- cmp_refcount_rec_by_cpos, swap_refcount_rec);
+ cmp_refcount_rec_by_cpos, NULL);
sort(&new_rl->rl_recs, le16_to_cpu(new_rl->rl_used),
sizeof(struct ocfs2_refcount_rec),
- cmp_refcount_rec_by_cpos, swap_refcount_rec);
+ cmp_refcount_rec_by_cpos, NULL);
*split_cpos = cpos;
return 0;
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 35c0cc2a51af..0e58a5ce539e 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -4167,15 +4167,6 @@ static int cmp_xe(const void *a, const void *b)
return 0;
}
-static void swap_xe(void *a, void *b, int size)
-{
- struct ocfs2_xattr_entry *l = a, *r = b, tmp;
-
- tmp = *l;
- memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
- memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
-}
-
/*
* When the ocfs2_xattr_block is filled up, new bucket will be created
* and all the xattr entries will be moved to the new bucket.
@@ -4241,7 +4232,7 @@ static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
trace_ocfs2_cp_xattr_block_to_bucket_end(offset, size, off_change);
sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
- cmp_xe, swap_xe);
+ cmp_xe, NULL);
}
/*
@@ -4436,7 +4427,7 @@ static int ocfs2_defrag_xattr_bucket(struct inode *inode,
*/
sort(entries, le16_to_cpu(xh->xh_count),
sizeof(struct ocfs2_xattr_entry),
- cmp_xe_offset, swap_xe);
+ cmp_xe_offset, NULL);
/* Move all name/values to the end of the bucket. */
xe = xh->xh_entries;
@@ -4478,7 +4469,7 @@ static int ocfs2_defrag_xattr_bucket(struct inode *inode,
/* sort the entries by their name_hash. */
sort(entries, le16_to_cpu(xh->xh_count),
sizeof(struct ocfs2_xattr_entry),
- cmp_xe, swap_xe);
+ cmp_xe, NULL);
buf = bucket_buf;
for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
--
2.34.1
On 8/11/24 03:53, Kuan-Wei Chiu wrote:
> The custom swap functions used in ocfs2 do not perform any special
> operations and can be replaced with the built-in swap function of sort.
> This change not only reduces code size but also improves efficiency,
> especially in scenarios where CONFIG_RETPOLINE is enabled, as it makes
> indirect function calls more expensive.
>
> By using the built-in swap, we avoid these costly indirect function
> calls, leading to better performance.
>
> Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Looks good to me
Signed-off-by: Heming Zhao <heming.zhao@suse.com>
> ---
> Note: Build test only.
>
> fs/ocfs2/dir.c | 12 +-----------
> fs/ocfs2/refcounttree.c | 13 +++----------
> fs/ocfs2/xattr.c | 15 +++------------
> 3 files changed, 7 insertions(+), 33 deletions(-)
>
> diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
> index f0beb173dbba..fa5d0819a997 100644
> --- a/fs/ocfs2/dir.c
> +++ b/fs/ocfs2/dir.c
> @@ -3511,16 +3511,6 @@ static int dx_leaf_sort_cmp(const void *a, const void *b)
> return 0;
> }
>
> -static void dx_leaf_sort_swap(void *a, void *b, int size)
> -{
> - struct ocfs2_dx_entry *entry1 = a;
> - struct ocfs2_dx_entry *entry2 = b;
> -
> - BUG_ON(size != sizeof(*entry1));
> -
> - swap(*entry1, *entry2);
> -}
> -
> static int ocfs2_dx_leaf_same_major(struct ocfs2_dx_leaf *dx_leaf)
> {
> struct ocfs2_dx_entry_list *dl_list = &dx_leaf->dl_list;
> @@ -3781,7 +3771,7 @@ static int ocfs2_dx_dir_rebalance(struct ocfs2_super *osb, struct inode *dir,
> */
> sort(dx_leaf->dl_list.de_entries, num_used,
> sizeof(struct ocfs2_dx_entry), dx_leaf_sort_cmp,
> - dx_leaf_sort_swap);
> + NULL);
>
> ocfs2_journal_dirty(handle, dx_leaf_bh);
>
> diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
> index 1f303b1adf1a..4f85508538fc 100644
> --- a/fs/ocfs2/refcounttree.c
> +++ b/fs/ocfs2/refcounttree.c
> @@ -1392,13 +1392,6 @@ static int cmp_refcount_rec_by_cpos(const void *a, const void *b)
> return 0;
> }
>
> -static void swap_refcount_rec(void *a, void *b, int size)
> -{
> - struct ocfs2_refcount_rec *l = a, *r = b;
> -
> - swap(*l, *r);
> -}
> -
> /*
> * The refcount cpos are ordered by their 64bit cpos,
> * But we will use the low 32 bit to be the e_cpos in the b-tree.
> @@ -1474,7 +1467,7 @@ static int ocfs2_divide_leaf_refcount_block(struct buffer_head *ref_leaf_bh,
> */
> sort(&rl->rl_recs, le16_to_cpu(rl->rl_used),
> sizeof(struct ocfs2_refcount_rec),
> - cmp_refcount_rec_by_low_cpos, swap_refcount_rec);
> + cmp_refcount_rec_by_low_cpos, NULL);
>
> ret = ocfs2_find_refcount_split_pos(rl, &cpos, &split_index);
> if (ret) {
> @@ -1499,11 +1492,11 @@ static int ocfs2_divide_leaf_refcount_block(struct buffer_head *ref_leaf_bh,
>
> sort(&rl->rl_recs, le16_to_cpu(rl->rl_used),
> sizeof(struct ocfs2_refcount_rec),
> - cmp_refcount_rec_by_cpos, swap_refcount_rec);
> + cmp_refcount_rec_by_cpos, NULL);
>
> sort(&new_rl->rl_recs, le16_to_cpu(new_rl->rl_used),
> sizeof(struct ocfs2_refcount_rec),
> - cmp_refcount_rec_by_cpos, swap_refcount_rec);
> + cmp_refcount_rec_by_cpos, NULL);
>
> *split_cpos = cpos;
> return 0;
> diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
> index 35c0cc2a51af..0e58a5ce539e 100644
> --- a/fs/ocfs2/xattr.c
> +++ b/fs/ocfs2/xattr.c
> @@ -4167,15 +4167,6 @@ static int cmp_xe(const void *a, const void *b)
> return 0;
> }
>
> -static void swap_xe(void *a, void *b, int size)
> -{
> - struct ocfs2_xattr_entry *l = a, *r = b, tmp;
> -
> - tmp = *l;
> - memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
> - memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
> -}
> -
> /*
> * When the ocfs2_xattr_block is filled up, new bucket will be created
> * and all the xattr entries will be moved to the new bucket.
> @@ -4241,7 +4232,7 @@ static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
> trace_ocfs2_cp_xattr_block_to_bucket_end(offset, size, off_change);
>
> sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
> - cmp_xe, swap_xe);
> + cmp_xe, NULL);
> }
>
> /*
> @@ -4436,7 +4427,7 @@ static int ocfs2_defrag_xattr_bucket(struct inode *inode,
> */
> sort(entries, le16_to_cpu(xh->xh_count),
> sizeof(struct ocfs2_xattr_entry),
> - cmp_xe_offset, swap_xe);
> + cmp_xe_offset, NULL);
>
> /* Move all name/values to the end of the bucket. */
> xe = xh->xh_entries;
> @@ -4478,7 +4469,7 @@ static int ocfs2_defrag_xattr_bucket(struct inode *inode,
> /* sort the entries by their name_hash. */
> sort(entries, le16_to_cpu(xh->xh_count),
> sizeof(struct ocfs2_xattr_entry),
> - cmp_xe, swap_xe);
> + cmp_xe, NULL);
>
> buf = bucket_buf;
> for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
On 8/18/24 7:36 PM, Heming Zhao wrote:
> On 8/11/24 03:53, Kuan-Wei Chiu wrote:
>> The custom swap functions used in ocfs2 do not perform any special
>> operations and can be replaced with the built-in swap function of sort.
>> This change not only reduces code size but also improves efficiency,
>> especially in scenarios where CONFIG_RETPOLINE is enabled, as it makes
>> indirect function calls more expensive.
>>
>> By using the built-in swap, we avoid these costly indirect function
>> calls, leading to better performance.
>>
>> Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
>
> Looks good to me
> Signed-off-by: Heming Zhao <heming.zhao@suse.com>
>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
>> ---
>> Note: Build test only.
>>
>> fs/ocfs2/dir.c | 12 +-----------
>> fs/ocfs2/refcounttree.c | 13 +++----------
>> fs/ocfs2/xattr.c | 15 +++------------
>> 3 files changed, 7 insertions(+), 33 deletions(-)
>>
>> diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
>> index f0beb173dbba..fa5d0819a997 100644
>> --- a/fs/ocfs2/dir.c
>> +++ b/fs/ocfs2/dir.c
>> @@ -3511,16 +3511,6 @@ static int dx_leaf_sort_cmp(const void *a, const void *b)
>> return 0;
>> }
>> -static void dx_leaf_sort_swap(void *a, void *b, int size)
>> -{
>> - struct ocfs2_dx_entry *entry1 = a;
>> - struct ocfs2_dx_entry *entry2 = b;
>> -
>> - BUG_ON(size != sizeof(*entry1));
>> -
>> - swap(*entry1, *entry2);
>> -}
>> -
>> static int ocfs2_dx_leaf_same_major(struct ocfs2_dx_leaf *dx_leaf)
>> {
>> struct ocfs2_dx_entry_list *dl_list = &dx_leaf->dl_list;
>> @@ -3781,7 +3771,7 @@ static int ocfs2_dx_dir_rebalance(struct ocfs2_super *osb, struct inode *dir,
>> */
>> sort(dx_leaf->dl_list.de_entries, num_used,
>> sizeof(struct ocfs2_dx_entry), dx_leaf_sort_cmp,
>> - dx_leaf_sort_swap);
>> + NULL);
>> ocfs2_journal_dirty(handle, dx_leaf_bh);
>> diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
>> index 1f303b1adf1a..4f85508538fc 100644
>> --- a/fs/ocfs2/refcounttree.c
>> +++ b/fs/ocfs2/refcounttree.c
>> @@ -1392,13 +1392,6 @@ static int cmp_refcount_rec_by_cpos(const void *a, const void *b)
>> return 0;
>> }
>> -static void swap_refcount_rec(void *a, void *b, int size)
>> -{
>> - struct ocfs2_refcount_rec *l = a, *r = b;
>> -
>> - swap(*l, *r);
>> -}
>> -
>> /*
>> * The refcount cpos are ordered by their 64bit cpos,
>> * But we will use the low 32 bit to be the e_cpos in the b-tree.
>> @@ -1474,7 +1467,7 @@ static int ocfs2_divide_leaf_refcount_block(struct buffer_head *ref_leaf_bh,
>> */
>> sort(&rl->rl_recs, le16_to_cpu(rl->rl_used),
>> sizeof(struct ocfs2_refcount_rec),
>> - cmp_refcount_rec_by_low_cpos, swap_refcount_rec);
>> + cmp_refcount_rec_by_low_cpos, NULL);
>> ret = ocfs2_find_refcount_split_pos(rl, &cpos, &split_index);
>> if (ret) {
>> @@ -1499,11 +1492,11 @@ static int ocfs2_divide_leaf_refcount_block(struct buffer_head *ref_leaf_bh,
>> sort(&rl->rl_recs, le16_to_cpu(rl->rl_used),
>> sizeof(struct ocfs2_refcount_rec),
>> - cmp_refcount_rec_by_cpos, swap_refcount_rec);
>> + cmp_refcount_rec_by_cpos, NULL);
>> sort(&new_rl->rl_recs, le16_to_cpu(new_rl->rl_used),
>> sizeof(struct ocfs2_refcount_rec),
>> - cmp_refcount_rec_by_cpos, swap_refcount_rec);
>> + cmp_refcount_rec_by_cpos, NULL);
>> *split_cpos = cpos;
>> return 0;
>> diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
>> index 35c0cc2a51af..0e58a5ce539e 100644
>> --- a/fs/ocfs2/xattr.c
>> +++ b/fs/ocfs2/xattr.c
>> @@ -4167,15 +4167,6 @@ static int cmp_xe(const void *a, const void *b)
>> return 0;
>> }
>> -static void swap_xe(void *a, void *b, int size)
>> -{
>> - struct ocfs2_xattr_entry *l = a, *r = b, tmp;
>> -
>> - tmp = *l;
>> - memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
>> - memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
>> -}
>> -
>> /*
>> * When the ocfs2_xattr_block is filled up, new bucket will be created
>> * and all the xattr entries will be moved to the new bucket.
>> @@ -4241,7 +4232,7 @@ static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
>> trace_ocfs2_cp_xattr_block_to_bucket_end(offset, size, off_change);
>> sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
>> - cmp_xe, swap_xe);
>> + cmp_xe, NULL);
>> }
>> /*
>> @@ -4436,7 +4427,7 @@ static int ocfs2_defrag_xattr_bucket(struct inode *inode,
>> */
>> sort(entries, le16_to_cpu(xh->xh_count),
>> sizeof(struct ocfs2_xattr_entry),
>> - cmp_xe_offset, swap_xe);
>> + cmp_xe_offset, NULL);
>> /* Move all name/values to the end of the bucket. */
>> xe = xh->xh_entries;
>> @@ -4478,7 +4469,7 @@ static int ocfs2_defrag_xattr_bucket(struct inode *inode,
>> /* sort the entries by their name_hash. */
>> sort(entries, le16_to_cpu(xh->xh_count),
>> sizeof(struct ocfs2_xattr_entry),
>> - cmp_xe, swap_xe);
>> + cmp_xe, NULL);
>> buf = bucket_buf;
>> for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
On 8/19/24 10:41, Joseph Qi wrote:
>
> On 8/18/24 7:36 PM, Heming Zhao wrote:
>> On 8/11/24 03:53, Kuan-Wei Chiu wrote:
>>> The custom swap functions used in ocfs2 do not perform any special
>>> operations and can be replaced with the built-in swap function of sort.
>>> This change not only reduces code size but also improves efficiency,
>>> especially in scenarios where CONFIG_RETPOLINE is enabled, as it makes
>>> indirect function calls more expensive.
>>>
>>> By using the built-in swap, we avoid these costly indirect function
>>> calls, leading to better performance.
>>>
>>> Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
>>
>> Looks good to me
>> Signed-off-by: Heming Zhao <heming.zhao@suse.com>
Sorry for my mistake, above tag should be:
Reviewed-by: Heming Zhao <heming.zhao@suse.com>
>>
>
> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
>
>>> ---
>>> Note: Build test only.
>>>
>>> fs/ocfs2/dir.c | 12 +-----------
>>> fs/ocfs2/refcounttree.c | 13 +++----------
>>> fs/ocfs2/xattr.c | 15 +++------------
>>> 3 files changed, 7 insertions(+), 33 deletions(-)
>>>
>>> diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
>>> index f0beb173dbba..fa5d0819a997 100644
>>> --- a/fs/ocfs2/dir.c
>>> +++ b/fs/ocfs2/dir.c
>>> @@ -3511,16 +3511,6 @@ static int dx_leaf_sort_cmp(const void *a, const void *b)
>>> return 0;
>>> }
>>> -static void dx_leaf_sort_swap(void *a, void *b, int size)
>>> -{
>>> - struct ocfs2_dx_entry *entry1 = a;
>>> - struct ocfs2_dx_entry *entry2 = b;
>>> -
>>> - BUG_ON(size != sizeof(*entry1));
>>> -
>>> - swap(*entry1, *entry2);
>>> -}
>>> -
>>> static int ocfs2_dx_leaf_same_major(struct ocfs2_dx_leaf *dx_leaf)
>>> {
>>> struct ocfs2_dx_entry_list *dl_list = &dx_leaf->dl_list;
>>> @@ -3781,7 +3771,7 @@ static int ocfs2_dx_dir_rebalance(struct ocfs2_super *osb, struct inode *dir,
>>> */
>>> sort(dx_leaf->dl_list.de_entries, num_used,
>>> sizeof(struct ocfs2_dx_entry), dx_leaf_sort_cmp,
>>> - dx_leaf_sort_swap);
>>> + NULL);
>>> ocfs2_journal_dirty(handle, dx_leaf_bh);
>>> diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
>>> index 1f303b1adf1a..4f85508538fc 100644
>>> --- a/fs/ocfs2/refcounttree.c
>>> +++ b/fs/ocfs2/refcounttree.c
>>> @@ -1392,13 +1392,6 @@ static int cmp_refcount_rec_by_cpos(const void *a, const void *b)
>>> return 0;
>>> }
>>> -static void swap_refcount_rec(void *a, void *b, int size)
>>> -{
>>> - struct ocfs2_refcount_rec *l = a, *r = b;
>>> -
>>> - swap(*l, *r);
>>> -}
>>> -
>>> /*
>>> * The refcount cpos are ordered by their 64bit cpos,
>>> * But we will use the low 32 bit to be the e_cpos in the b-tree.
>>> @@ -1474,7 +1467,7 @@ static int ocfs2_divide_leaf_refcount_block(struct buffer_head *ref_leaf_bh,
>>> */
>>> sort(&rl->rl_recs, le16_to_cpu(rl->rl_used),
>>> sizeof(struct ocfs2_refcount_rec),
>>> - cmp_refcount_rec_by_low_cpos, swap_refcount_rec);
>>> + cmp_refcount_rec_by_low_cpos, NULL);
>>> ret = ocfs2_find_refcount_split_pos(rl, &cpos, &split_index);
>>> if (ret) {
>>> @@ -1499,11 +1492,11 @@ static int ocfs2_divide_leaf_refcount_block(struct buffer_head *ref_leaf_bh,
>>> sort(&rl->rl_recs, le16_to_cpu(rl->rl_used),
>>> sizeof(struct ocfs2_refcount_rec),
>>> - cmp_refcount_rec_by_cpos, swap_refcount_rec);
>>> + cmp_refcount_rec_by_cpos, NULL);
>>> sort(&new_rl->rl_recs, le16_to_cpu(new_rl->rl_used),
>>> sizeof(struct ocfs2_refcount_rec),
>>> - cmp_refcount_rec_by_cpos, swap_refcount_rec);
>>> + cmp_refcount_rec_by_cpos, NULL);
>>> *split_cpos = cpos;
>>> return 0;
>>> diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
>>> index 35c0cc2a51af..0e58a5ce539e 100644
>>> --- a/fs/ocfs2/xattr.c
>>> +++ b/fs/ocfs2/xattr.c
>>> @@ -4167,15 +4167,6 @@ static int cmp_xe(const void *a, const void *b)
>>> return 0;
>>> }
>>> -static void swap_xe(void *a, void *b, int size)
>>> -{
>>> - struct ocfs2_xattr_entry *l = a, *r = b, tmp;
>>> -
>>> - tmp = *l;
>>> - memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
>>> - memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
>>> -}
>>> -
>>> /*
>>> * When the ocfs2_xattr_block is filled up, new bucket will be created
>>> * and all the xattr entries will be moved to the new bucket.
>>> @@ -4241,7 +4232,7 @@ static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
>>> trace_ocfs2_cp_xattr_block_to_bucket_end(offset, size, off_change);
>>> sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
>>> - cmp_xe, swap_xe);
>>> + cmp_xe, NULL);
>>> }
>>> /*
>>> @@ -4436,7 +4427,7 @@ static int ocfs2_defrag_xattr_bucket(struct inode *inode,
>>> */
>>> sort(entries, le16_to_cpu(xh->xh_count),
>>> sizeof(struct ocfs2_xattr_entry),
>>> - cmp_xe_offset, swap_xe);
>>> + cmp_xe_offset, NULL);
>>> /* Move all name/values to the end of the bucket. */
>>> xe = xh->xh_entries;
>>> @@ -4478,7 +4469,7 @@ static int ocfs2_defrag_xattr_bucket(struct inode *inode,
>>> /* sort the entries by their name_hash. */
>>> sort(entries, le16_to_cpu(xh->xh_count),
>>> sizeof(struct ocfs2_xattr_entry),
>>> - cmp_xe, swap_xe);
>>> + cmp_xe, NULL);
>>> buf = bucket_buf;
>>> for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
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