The quilt patch titled
Subject: mm: zswap: rename zswap_pool_get() to zswap_pool_tryget()
has been removed from the -mm tree. Its filename was
mm-zswap-rename-zswap_pool_get-to-zswap_pool_tryget.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Kanchana P Sridhar <kanchana.p.sridhar@xxxxxxxxx>
Subject: mm: zswap: rename zswap_pool_get() to zswap_pool_tryget()
Date: Mon, 30 Sep 2024 22:32:18 -0700
Modify the name of the existing zswap_pool_get() to zswap_pool_tryget() to
be representative of the call it makes to percpu_ref_tryget(). A
subsequent patch will introduce a new zswap_pool_get() that calls
percpu_ref_get().
The intent behind this change is for higher level zswap API such as
zswap_store() to call zswap_pool_tryget() to check upfront if the pool's
refcount is "0" (which means it could be getting destroyed) and to handle
this as an error condition. zswap_store() would proceed only if
zswap_pool_tryget() returns success, and any additional pool refcounts
that need to be obtained for compressing sub-pages in a large folio could
simply call zswap_pool_get().
Link: https://lkml.kernel.org/r/20241001053222.6944-4-kanchana.p.sridhar@xxxxxxxxx
Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@xxxxxxxxx>
Acked-by: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
Reviewed-by: Chengming Zhou <chengming.zhou@xxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Reviewed-by: Nhat Pham <nphamcs@xxxxxxxxx>
Cc: "Huang, Ying" <ying.huang@xxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Shakeel Butt <shakeel.butt@xxxxxxxxx>
Cc: Usama Arif <usamaarif642@xxxxxxxxx>
Cc: Wajdi Feghali <wajdi.k.feghali@xxxxxxxxx>
Cc: "Zou, Nanhai" <nanhai.zou@xxxxxxxxx>
Cc: Barry Song <21cnbao@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/zswap.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/zswap.c~mm-zswap-rename-zswap_pool_get-to-zswap_pool_tryget
+++ a/mm/zswap.c
@@ -402,7 +402,7 @@ static void __zswap_pool_empty(struct pe
spin_unlock_bh(&zswap_pools_lock);
}
-static int __must_check zswap_pool_get(struct zswap_pool *pool)
+static int __must_check zswap_pool_tryget(struct zswap_pool *pool)
{
if (!pool)
return 0;
@@ -440,7 +440,7 @@ static struct zswap_pool *zswap_pool_cur
rcu_read_lock();
pool = __zswap_pool_current();
- if (!zswap_pool_get(pool))
+ if (!zswap_pool_tryget(pool))
pool = NULL;
rcu_read_unlock();
@@ -461,7 +461,7 @@ static struct zswap_pool *zswap_pool_fin
if (strcmp(zpool_get_type(pool->zpool), type))
continue;
/* if we can't get it, it's about to be destroyed */
- if (!zswap_pool_get(pool))
+ if (!zswap_pool_tryget(pool))
continue;
return pool;
}
_
Patches currently in -mm which might be from kanchana.p.sridhar@xxxxxxxxx are
