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Wed, 04 Feb 2026 10:54:29 -0800 (PST) From: Sahil Chandna To: akpm@linux-foundation.org, hannes@cmpxchg.org, yosry.ahmed@linux.dev, nphamcs@gmail.com, david@kernel.org, sj@kernel.org, mhocko@kernel.org, zhengqi.arch@bytedance.com, shakeel.butt@linux.dev, lorenzo.stoakes@oracle.com, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, chengming.zhou@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Sahil Chandna Subject: [PATCH v5 1/2] mm/vmscan: use %pe to print error pointers Date: Thu, 5 Feb 2026 00:24:07 +0530 Message-ID: <80a6643657a60e75ddf48b4869b3e7fdc101f855.1770230135.git.chandna.sahil@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Use the %pe printk format specifier to report error pointers directly instead of printing PTR_ERR() as a long value. This improves clarity, produces more readable error messages. This instance was flagged by the Coccinelle script (misc/ptr_err_to_pe.cocci) as an opportunity to adopt %pe. Found by: make coccicheck MODE=3Dreport M=3Dmm/ No functional change intended Acked-by: David Hildenbrand (Red Hat) Reviewed-by: SeongJae Park Signed-off-by: Sahil Chandna --- changes since v2: - Add Acked-by tag link to v2: https://lore.kernel.org/all/64e15c6b2ce86d7824f54e9e001b6f5b44a= f48b8.1763796152.git.chandna.sahil@gmail.com/ link to v3: https://lore.kernel.org/all/db049e564cafcb0913bee930d6a577ea430= 44f5b.1764177933.git.chandna.sahil@gmail.com/ link to v4: https://lore.kernel.org/all/2c842a64fddeb0fe0cac087783aaedd97ed= c3191.1764312627.git.chandna.sahil@gmail.com/ --- mm/vmscan.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 01d3364fe506..44e4fcd6463c 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -7479,8 +7479,8 @@ void __meminit kswapd_run(int nid) pgdat->kswapd =3D kthread_create_on_node(kswapd, pgdat, nid, "kswapd%d",= nid); if (IS_ERR(pgdat->kswapd)) { /* failure at boot is fatal */ - pr_err("Failed to start kswapd on node %d,ret=3D%ld\n", - nid, PTR_ERR(pgdat->kswapd)); 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Wed, 04 Feb 2026 10:54:36 -0800 (PST) From: Sahil Chandna To: akpm@linux-foundation.org, hannes@cmpxchg.org, yosry.ahmed@linux.dev, nphamcs@gmail.com, david@kernel.org, sj@kernel.org, mhocko@kernel.org, zhengqi.arch@bytedance.com, shakeel.butt@linux.dev, lorenzo.stoakes@oracle.com, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, chengming.zhou@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Sahil Chandna Subject: [PATCH v5 2/2] mm/zswap: use %pe to print error pointers Date: Thu, 5 Feb 2026 00:24:08 +0530 Message-ID: <581a26f22fb4c6ce04aeb7ee0d703fe64454ac7f.1770230135.git.chandna.sahil@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Use the %pe printk format specifier to report error pointers directly instead of printing PTR_ERR() as a long value. This improves clarity, produces more readable error messages. This instance was flagged by the Coccinelle script (misc/ptr_err_to_pe.cocci) as an opportunity to adopt %pe. Found by: make coccicheck MODE=3Dreport M=3Dmm/ No functional change intended. Acked-by: Yosry Ahmed Acked-by: Nhat Pham Acked-by: David Hildenbrand (Red Hat) Reviewed-by: SeongJae Park Signed-off-by: Sahil Chandna --- Changes since v2: - Add Acked-by tag. link to v2: https://lore.kernel.org/all/0c00ceedce6e0d9aed35cee5faf15fd9126= a1f70.1763796152.git.chandna.sahil@gmail.com/ link to v3: https://lore.kernel.org/all/57b7205813aa87c8f5c8bf765e5a8d88dae= ba68f.1764177933.git.chandna.sahil@gmail.com/ link to v4: https://lore.kernel.org/all/6d729a60eb71baade3670e5bb609a068683= af3eb.1764312627.git.chandna.sahil@gmail.com/ --- mm/zswap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/zswap.c b/mm/zswap.c index 3d2d59ac3f9c..af3f0fbb0558 100644 --- a/mm/zswap.c +++ b/mm/zswap.c @@ -749,8 +749,8 @@ static int zswap_cpu_comp_prepare(unsigned int cpu, str= uct hlist_node *node) =20 acomp =3D crypto_alloc_acomp_node(pool->tfm_name, 0, 0, cpu_to_node(cpu)); if (IS_ERR(acomp)) { - pr_err("could not alloc crypto acomp %s : %ld\n", - pool->tfm_name, PTR_ERR(acomp)); + pr_err("could not alloc crypto acomp %s : %pe\n", + pool->tfm_name, acomp); ret =3D PTR_ERR(acomp); goto fail; } --=20 2.50.1