diff options
| author | Jackie Liu <liuyun01@kylinos.cn> | 2025-09-08 14:26:14 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-09-21 14:22:30 -0700 |
| commit | 5919f1282141f29345432a4f1dadf34716f3dbec (patch) | |
| tree | 490a79a2ed877657b9d09ffbdaaae5531af6702e | |
| parent | 6ce3bc990cf0cc1ea1bfcae7149e095afd898d41 (diff) | |
mm/shmem: remove unused entry_order after large swapin rework
After commit 93c0476e7057 ("mm/shmem, swap: rework swap entry and index
calculation for large swapin"), xas_get_order() will never return a
non-zero value for `entry_order` in shmem_split_large_entry(). As a
result, the local variable `entry_order` is effectively unused.
Clean up the code by removing `entry_order` and directly using
`cur_order`. This change is purely a refactor and has no functional
impact.
No functional change intended.
Link: https://lkml.kernel.org/r/20250908062614.89880-1-liu.yun@linux.dev
Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Kairui Song <kasong@tencent.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/shmem.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index cf0171a72e47..7db01567b645 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2173,7 +2173,7 @@ static int shmem_split_large_entry(struct inode *inode, pgoff_t index, { struct address_space *mapping = inode->i_mapping; XA_STATE_ORDER(xas, &mapping->i_pages, index, 0); - int split_order = 0, entry_order; + int split_order = 0; int i; /* Convert user data gfp flags to xarray node gfp flags */ @@ -2191,15 +2191,12 @@ static int shmem_split_large_entry(struct inode *inode, pgoff_t index, goto unlock; } - entry_order = xas_get_order(&xas); - - if (!entry_order) + cur_order = xas_get_order(&xas); + if (!cur_order) goto unlock; /* Try to split large swap entry in pagecache */ - cur_order = entry_order; - swap_index = round_down(index, 1 << entry_order); - + swap_index = round_down(index, 1 << cur_order); split_order = xas_try_split_min_order(cur_order); while (cur_order > 0) { |