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mm, swap: fold swap_info_get_cont in the only caller

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The name of the function is confusing, and the code is much easier to
follow after folding, also rename the confusing naming "p" to more
meaningful "si".

Link: https://lkml.kernel.org/r/20250113175732.48099-3-ryncsn@gmail.com
Signed-off-by: Kairui Song <kasong@tencent.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Cc: Barry Song <v-songbaohua@oppo.com>
Cc: Chis Li <chrisl@kernel.org>
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>
This commit is contained in:
Kairui Song
2025-01-14 01:57:21 +08:00
committed by Andrew Morton
parent d563ced682
commit e027ec414f
1 changed files with 15 additions and 24 deletions
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39
mm/swapfile.c
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@@ -1375,22 +1375,6 @@ static struct swap_info_struct *_swap_info_get(swp_entry_t entry)
return NULL;
}
static struct swap_info_struct *swap_info_get_cont(swp_entry_t entry,
struct swap_info_struct *q)
{
struct swap_info_struct *p;
p = _swap_info_get(entry);
if (p != q) {
if (q != NULL)
spin_unlock(&q->lock);
if (p != NULL)
spin_lock(&p->lock);
}
return p;
}
static unsigned char __swap_entry_free_locked(struct swap_info_struct *si,
unsigned long offset,
unsigned char usage)
@@ -1687,14 +1671,14 @@ static int swp_entry_cmp(const void *ent1, const void *ent2)
void swapcache_free_entries(swp_entry_t *entries, int n)
{
struct swap_info_struct *p, *prev;
struct swap_info_struct *si, *prev;
int i;
if (n <= 0)
return;
prev = NULL;
p = NULL;
si = NULL;
/*
* Sort swap entries by swap device, so each lock is only taken once.
@@ -1704,13 +1688,20 @@ void swapcache_free_entries(swp_entry_t *entries, int n)
if (nr_swapfiles > 1)
sort(entries, n, sizeof(entries[0]), swp_entry_cmp, NULL);
for (i = 0; i < n; ++i) {
p = swap_info_get_cont(entries[i], prev);
if (p)
swap_entry_range_free(p, entries[i], 1);
prev = p;
si = _swap_info_get(entries[i]);
if (si != prev) {
if (prev != NULL)
spin_unlock(&prev->lock);
if (si != NULL)
spin_lock(&si->lock);
}
if (si)
swap_entry_range_free(si, entries[i], 1);
prev = si;
}
if (p)
spin_unlock(&p->lock);
if (si)
spin_unlock(&si->lock);
}
int __swap_count(swp_entry_t entry)