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| author |   Kairui Song <kasong@tencent.com> | 2025-01-14 01:57:30 +0800 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2025-01-25 20:22:37 -0800 |
| commit | 3f641cf938e6a3d5ad2e219c3ad1638b6886a291 (patch) | |
| tree | 64a12f6446f602b639f1119d85576d4d0ef36259 | |
| parent | mm, swap: simplify percpu cluster updating (diff) | |
| download | wireguard-linux-3f641cf938e6a3d5ad2e219c3ad1638b6886a291.tar.xz wireguard-linux-3f641cf938e6a3d5ad2e219c3ad1638b6886a291.zip | |
mm, swap: introduce a helper for retrieving cluster from offset
It's a common operation to retrieve the cluster info from offset,
introduce a helper for this.
Link: https://lkml.kernel.org/r/20250113175732.48099-12-ryncsn@gmail.com
Signed-off-by: Kairui Song <kasong@tencent.com>
Suggested-by: Chris Li <chrisl@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Barry Song <v-songbaohua@oppo.com>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Hugh Dickens <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Yosry Ahmed <yosryahmed@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/swapfile.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 6da2f3aa55fb..37d540fa0310 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -424,6 +424,12 @@ static inline unsigned int cluster_index(struct swap_info_struct *si, return ci - si->cluster_info; } +static inline struct swap_cluster_info *offset_to_cluster(struct swap_info_struct *si, + unsigned long offset) +{ + return &si->cluster_info[offset / SWAPFILE_CLUSTER]; +} + static inline unsigned int cluster_offset(struct swap_info_struct *si, struct swap_cluster_info *ci) { @@ -435,7 +441,7 @@ static inline struct swap_cluster_info *lock_cluster(struct swap_info_struct *si { struct swap_cluster_info *ci; - ci = &si->cluster_info[offset / SWAPFILE_CLUSTER]; + ci = offset_to_cluster(si, offset); spin_lock(&ci->lock); return ci; @@ -1480,10 +1486,10 @@ static void swap_entry_range_free(struct swap_info_struct *si, swp_entry_t entry unsigned char *map_end = map + nr_pages; struct swap_cluster_info *ci; - /* It should never free entries across different clusters */ - VM_BUG_ON((offset / SWAPFILE_CLUSTER) != ((offset + nr_pages - 1) / SWAPFILE_CLUSTER)); - ci = lock_cluster(si, offset); + + /* It should never free entries across different clusters */ + VM_BUG_ON(ci != offset_to_cluster(si, offset + nr_pages - 1)); VM_BUG_ON(cluster_is_empty(ci)); VM_BUG_ON(ci->count < nr_pages); |