From: Philipp Hahn <phahn-oss@avm.de>
To: amd-gfx@lists.freedesktop.org, apparmor@lists.ubuntu.com,
bpf@vger.kernel.org, ceph-devel@vger.kernel.org, cocci@inria.fr,
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Philipp Hahn <phahn-oss@avm.de>
Cc: Julia Lawall <Julia.Lawall@inria.fr>,
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Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Pali Rohár <pali@kernel.org>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>
Subject: [PATCH 00/61] treewide: Use IS_ERR_OR_NULL over manual NULL check - refactor
Date: Tue, 10 Mar 2026 12:48:26 +0100 [thread overview]
Message-ID: <20260310-b4-is_err_or_null-v1-0-bd63b656022d@avm.de> (raw)
While doing some static code analysis I stumbled over a common pattern,
where IS_ERR() is combined with a NULL check. For that there is
IS_ERR_OR_NULL().
I've written a Coccinelle patch to find and patch those instances.
The patches follow grouped by subsystem.
Patches 55-58 may be dropped as they have a (minor?) semantic change:
They use WARN_ON() or WARN_ON_ONCE(), but only in the IS_ERR() path, not
for the NULL check. Iff it is okay to print the warning also for NULL,
then the patches can be applied.
While generating the patch set `checkpatch` complained about mixing
[un]likely() with IS_ERR_OR_NULL(), which already uses likely()
internally. I found and fixed several locations, where that combination
has been used.
Signed-off-by: Philipp Hahn <phahn-oss@avm.de>
---
Philipp Hahn (61):
Coccinelle: Prefer IS_ERR_OR_NULL over manual NULL check
btrfs: Prefer IS_ERR_OR_NULL over manual NULL check
ceph: Prefer IS_ERR_OR_NULL over manual NULL check
ext4: Prefer IS_ERR_OR_NULL over manual NULL check
smb: Prefer IS_ERR_OR_NULL over manual NULl check
9p: Prefer IS_ERR_OR_NULL over manual NULL check
erofs: Prefer IS_ERR_OR_NULL over manual NULL check
fuse: Prefer IS_ERR_OR_NULL over manual NULL check
ntfs3: Prefer IS_ERR_OR_NULL over manual NULL check
gfs2: Prefer IS_ERR_OR_NULL over manual NULL check
pstore: Prefer IS_ERR_OR_NULL over manual NULL check
quota: Prefer IS_ERR_OR_NULL over manual NULL check
squashfs: Prefer IS_ERR_OR_NULL over manual NULL check
seq_file: Prefer IS_ERR_OR_NULL over manual NULL check
trace: Prefer IS_ERR_OR_NULL over manual NULL check
sched: Prefer IS_ERR_OR_NULL over manual NULL check
module: Prefer IS_ERR_OR_NULL over manual NULL check
sound: Prefer IS_ERR_OR_NULL over manual NULL check
kvm: Prefer IS_ERR_OR_NULL over manual NULL check
apparmor: Prefer IS_ERR_OR_NULL over manual NULL check
lib/test: Prefer IS_ERR_OR_NULL over manual NULL check
md: Prefer IS_ERR_OR_NULL over manual NULL check
net/ipv6: Prefer IS_ERR_OR_NULL over manual NULL check
net/9p: Prefer IS_ERR_OR_NULL over manual NULL check
net/bluetooth: Prefer IS_ERR_OR_NULL over manual NULL check
net/core: Prefer IS_ERR_OR_NULL over manual NULL check
net/netlink: Prefer IS_ERR_OR_NULL over manual NULL check
net/sched: Prefer IS_ERR_OR_NULL over manual NULL check
net/sctp: Prefer IS_ERR_OR_NULL over manual NULL check
net/sunrpc: Prefer IS_ERR_OR_NULL over manual NULL check
net/tipc: Prefer IS_ERR_OR_NULL over manual NULL check
net/wireless: Prefer IS_ERR_OR_NULL over manual NULL check
mm: Prefer IS_ERR_OR_NULL over manual NULL check
arch/arm: Prefer IS_ERR_OR_NULL over manual NULL check
arch/mips: Prefer IS_ERR_OR_NULL over manual NULL check
arch/sh: Prefer IS_ERR_OR_NULL over manual NULL check
drm: Prefer IS_ERR_OR_NULL over manual NULL check
net: Prefer IS_ERR_OR_NULL over manual NULL check
irqchip: Prefer IS_ERR_OR_NULL over manual NULL check
phy: Prefer IS_ERR_OR_NULL over manual NULL check
pinctrl: Prefer IS_ERR_OR_NULL over manual NULL check
pmdomain: Prefer IS_ERR_OR_NULL over manual NULL check
s390: Prefer IS_ERR_OR_NULL over manual NULL check
target: Prefer IS_ERR_OR_NULL over manual NULL check
thermal: Prefer IS_ERR_OR_NULL over manual NULL check
vfio: Prefer IS_ERR_OR_NULL over manual NULL check
nfc: Prefer IS_ERR_OR_NULL over manual NULL check
mtd: Prefer IS_ERR_OR_NULL over manual NULL check
media: Prefer IS_ERR_OR_NULL over manual NULL check
iommu: Prefer IS_ERR_OR_NULL over manual NULL check
leds: Prefer IS_ERR_OR_NULL over manual NULL check
gpib: Prefer IS_ERR_OR_NULL over manual NULL check
hyperv: Prefer IS_ERR_OR_NULL over manual NULL check
aoe: Prefer IS_ERR_OR_NULL over manual NULL check
interconnect: Prefer IS_ERR_OR_NULL over manual NULL check
clk: Prefer IS_ERR_OR_NULL over manual NULL check
reset: Prefer IS_ERR_OR_NULL over manual NULL check
arch/x86: Prefer IS_ERR_OR_NULL over manual NULL check
debugobjects: Drop likely() around !IS_ERR_OR_NULL()
Input alps: Drop unlikely() around IS_ERR_OR_NULL()
file: Drop unlikely() around IS_ERR_OR_NULL()
arch/arm/common/bL_switcher.c | 2 +-
arch/mips/lantiq/clk.c | 2 +-
arch/sh/mm/ioremap.c | 2 +-
arch/x86/kernel/callthunks.c | 2 +-
arch/x86/kernel/irq.c | 2 +-
drivers/block/aoe/aoecmd.c | 2 +-
drivers/clk/clk.c | 4 +-
drivers/clocksource/timer-pxa.c | 2 +-
drivers/gpib/common/iblib.c | 2 +-
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 2 +-
drivers/gpu/drm/drm_sysfs.c | 2 +-
drivers/gpu/drm/i915/gvt/scheduler.c | 4 +-
drivers/gpu/drm/radeon/radeon_test.c | 2 +-
drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 2 +-
drivers/hv/mshv_eventfd.c | 4 +-
drivers/input/mouse/alps.c | 2 +-
drivers/interconnect/core.c | 2 +-
drivers/iommu/omap-iommu.c | 2 +-
drivers/irqchip/irq-gic-v3.c | 2 +-
drivers/irqchip/irq-mvebu-odmi.c | 2 +-
drivers/leds/trigger/ledtrig-tty.c | 2 +-
drivers/md/dm-cache-metadata.c | 2 +-
drivers/md/dm-crypt.c | 4 +-
drivers/media/test-drivers/vimc/vimc-streamer.c | 2 +-
drivers/mtd/nand/raw/gpio.c | 10 +-
drivers/net/ethernet/aquantia/atlantic/aq_ring.c | 2 +-
drivers/net/ethernet/broadcom/tg3.c | 2 +-
.../net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c | 3 +-
drivers/net/ethernet/intel/ice/devlink/devlink.c | 2 +-
.../ethernet/marvell/prestera/prestera_router.c | 2 +-
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 +-
drivers/net/mdio/mdio-xgene.c | 2 +-
drivers/net/usb/r8152.c | 2 +-
drivers/nfc/trf7970a.c | 2 +-
drivers/phy/phy-core.c | 2 +-
drivers/pinctrl/core.c | 2 +-
drivers/pmdomain/rockchip/pm-domains.c | 2 +-
drivers/reset/core.c | 2 +-
drivers/s390/char/tape_class.c | 2 +-
drivers/target/target_core_fabric_configfs.c | 6 +-
drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 2 +-
drivers/vfio/vfio_main.c | 2 +-
fs/9p/fid.h | 2 +-
fs/btrfs/inode.c | 2 +-
fs/btrfs/transaction.c | 2 +-
fs/btrfs/tree-log.c | 2 +-
fs/btrfs/uuid-tree.c | 2 +-
fs/ceph/dir.c | 2 +-
fs/ceph/snap.c | 2 +-
fs/erofs/zdata.c | 2 +-
fs/ext4/fast_commit.c | 2 +-
fs/ext4/mballoc.c | 2 +-
fs/ext4/namei.c | 2 +-
fs/ext4/symlink.c | 2 +-
fs/fuse/dir.c | 2 +-
fs/gfs2/glock.c | 2 +-
fs/ntfs3/fsntfs.c | 8 +-
fs/pstore/zone.c | 2 +-
fs/quota/quota.c | 2 +-
fs/seq_file.c | 4 +-
fs/smb/client/cifsglob.h | 2 +-
fs/smb/client/connect.c | 2 +-
fs/smb/client/readdir.c | 2 +-
fs/squashfs/cache.c | 2 +-
include/linux/file.h | 2 +-
include/net/9p/client.h | 2 +-
kernel/module/main.c | 2 +-
kernel/sched/ext.c | 2 +-
kernel/trace/fprobe.c | 2 +-
kernel/trace/kprobe_event_gen_test.c | 2 +-
kernel/trace/trace_events_hist.c | 2 +-
lib/debugobjects.c | 2 +-
lib/test_firmware.c | 2 +-
lib/test_kmod.c | 4 +-
mm/kmemleak.c | 16 +--
net/9p/trans_rdma.c | 8 +-
net/bluetooth/mgmt.c | 6 +-
net/core/xdp.c | 2 +-
net/ipv6/ila/ila_xlat.c | 2 +-
net/ipv6/ndisc.c | 2 +-
net/netlink/af_netlink.c | 2 +-
net/sched/cls_api.c | 6 +-
net/sctp/socket.c | 2 +-
net/sunrpc/xprtrdma/svc_rdma_transport.c | 12 +-
net/tipc/socket.c | 2 +-
net/wireless/reg.c | 2 +-
scripts/coccinelle/api/is_err_or_null.cocci | 125 +++++++++++++++++++++
security/apparmor/apparmorfs.c | 2 +-
sound/soc/samsung/i2s.c | 4 +-
sound/soc/xtensa/xtfpga-i2s.c | 2 +-
virt/kvm/eventfd.c | 4 +-
91 files changed, 251 insertions(+), 127 deletions(-)
---
base-commit: 1f318b96cc84d7c2ab792fcc0bfd42a7ca890681
change-id: 20260305-b4-is_err_or_null-59998a7d03c4
Best regards,
--
Philipp Hahn <phahn-oss@avm.de>
next reply other threads:[~2026-03-11 8:06 UTC|newest]
Thread overview: 131+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-10 11:48 Philipp Hahn [this message]
2026-03-10 11:48 ` [PATCH 01/61] Coccinelle: Prefer IS_ERR_OR_NULL over manual NULL check Philipp Hahn
2026-03-10 15:41 ` Markus Elfring
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-11 15:12 ` Markus Elfring
2026-03-10 11:48 ` [PATCH 02/61] btrfs: " Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:48 ` [PATCH 03/61] ceph: " Philipp Hahn
2026-03-10 18:13 ` Viacheslav Dubeyko
2026-03-11 8:16 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:48 ` [PATCH 04/61] ext4: " Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:48 ` [PATCH 05/61] smb: Prefer IS_ERR_OR_NULL over manual NULl check Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:48 ` [PATCH 06/61] 9p: Prefer IS_ERR_OR_NULL over manual NULL check Philipp Hahn
2026-03-10 13:45 ` Christian Schoenebeck
2026-03-11 8:17 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:48 ` [PATCH 07/61] erofs: " Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:48 ` [PATCH 08/61] fuse: " Philipp Hahn
2026-03-11 8:18 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:48 ` [PATCH 09/61] ntfs3: " Philipp Hahn
2026-03-10 11:48 ` [PATCH 10/61] gfs2: " Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:48 ` [PATCH 11/61] pstore: " Philipp Hahn
2026-03-10 11:48 ` [PATCH 12/61] quota: " Philipp Hahn
2026-03-11 8:19 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:48 ` [PATCH 13/61] squashfs: " Philipp Hahn
2026-03-11 8:19 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:48 ` [PATCH 14/61] seq_file: " Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:48 ` [PATCH 15/61] trace: " Philipp Hahn
2026-03-10 14:07 ` Steven Rostedt
2026-03-11 5:13 ` Masami Hiramatsu (Google)
2026-03-11 14:03 ` Steven Rostedt
2026-03-11 14:06 ` Geert Uytterhoeven
2026-03-10 11:48 ` [PATCH 16/61] sched: " Philipp Hahn
2026-03-11 9:16 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:48 ` [PATCH 17/61] module: " Philipp Hahn
2026-03-10 14:45 ` Aaron Tomlin
2026-03-11 9:18 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:48 ` [PATCH 18/61] sound: " Philipp Hahn
2026-03-10 12:28 ` Mark Brown
2026-03-10 11:48 ` [PATCH 19/61] kvm: " Philipp Hahn
2026-03-10 11:48 ` [PATCH 20/61] apparmor: " Philipp Hahn
2026-03-10 11:48 ` [PATCH 21/61] lib/test: " Philipp Hahn
2026-03-10 11:48 ` [PATCH 22/61] md: " Philipp Hahn
2026-03-11 9:19 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:48 ` [PATCH 23/61] net/ipv6: " Philipp Hahn
2026-03-10 11:48 ` [PATCH 24/61] net/9p: " Philipp Hahn
2026-03-10 13:47 ` Christian Schoenebeck
2026-03-11 9:19 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:48 ` [PATCH 25/61] net/bluetooth: " Philipp Hahn
2026-03-10 13:55 ` Bastien Nocera
2026-03-11 9:21 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:48 ` [PATCH 26/61] net/core: " Philipp Hahn
2026-03-10 11:48 ` [PATCH 27/61] net/netlink: " Philipp Hahn
2026-03-10 11:48 ` [PATCH 28/61] net/sched: " Philipp Hahn
2026-03-11 9:22 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:48 ` [PATCH 29/61] net/sctp: " Philipp Hahn
2026-03-10 11:48 ` [PATCH 30/61] net/sunrpc: " Philipp Hahn
2026-03-10 12:23 ` Jeff Layton
2026-03-10 13:23 ` Chuck Lever
2026-03-11 9:22 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:48 ` [PATCH 31/61] net/tipc: " Philipp Hahn
2026-03-10 11:48 ` [PATCH 32/61] net/wireless: " Philipp Hahn
2026-03-10 11:48 ` [PATCH 33/61] mm: " Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:49 ` [PATCH 34/61] arch/arm: " Philipp Hahn
2026-03-10 11:49 ` [PATCH 35/61] arch/mips: " Philipp Hahn
2026-03-10 11:49 ` [PATCH 36/61] arch/sh: " Philipp Hahn
2026-03-11 13:15 ` Geert Uytterhoeven
2026-03-10 11:49 ` [PATCH 37/61] drm: " Philipp Hahn
2026-03-10 12:08 ` Christian König
2026-03-10 12:40 ` Jani Nikula
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:49 ` [PATCH 38/61] net: " Philipp Hahn
2026-03-10 15:07 ` [EXTERNAL] " Elad Nachman
2026-03-11 0:16 ` Russell King (Oracle)
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-11 9:24 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:49 ` [PATCH 39/61] irqchip: " Philipp Hahn
2026-03-11 9:24 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:49 ` [PATCH 40/61] phy: " Philipp Hahn
2026-03-10 11:49 ` [PATCH 41/61] pinctrl: " Philipp Hahn
2026-03-11 9:32 ` Linus Walleij
2026-03-10 11:49 ` [PATCH 42/61] pmdomain: " Philipp Hahn
2026-03-10 11:49 ` [PATCH 43/61] s390: " Philipp Hahn
2026-03-10 11:49 ` [PATCH 44/61] target: " Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:49 ` [PATCH 45/61] thermal: " Philipp Hahn
2026-03-10 11:49 ` [PATCH 46/61] vfio: " Philipp Hahn
2026-03-10 12:53 ` Pranjal Shrivastava
2026-03-11 9:25 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:49 ` [PATCH 47/61] nfc: " Philipp Hahn
2026-03-10 11:49 ` [PATCH 48/61] mtd: " Philipp Hahn
2026-03-10 11:49 ` [PATCH 49/61] media: " Philipp Hahn
2026-03-11 9:25 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:49 ` [PATCH 50/61] iommu: " Philipp Hahn
2026-03-11 9:26 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:49 ` [PATCH 51/61] leds: " Philipp Hahn
2026-03-10 13:33 ` (subset) " Lee Jones
2026-03-10 11:49 ` [PATCH 52/61] gpib: " Philipp Hahn
2026-03-10 11:49 ` [PATCH 53/61] hyperv: " Philipp Hahn
2026-03-10 11:49 ` [PATCH 54/61] aoe: " Philipp Hahn
2026-03-11 9:26 ` [Intel-wired-lan] " Loktionov, Aleksandr
2026-03-10 11:49 ` [PATCH 55/61] interconnect: " Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:49 ` [PATCH 56/61] clk: " Philipp Hahn
2026-03-10 13:21 ` Brian Masney
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-11 2:07 ` Chen-Yu Tsai
2026-03-10 11:49 ` [PATCH 57/61] reset: " Philipp Hahn
2026-03-10 12:43 ` Philipp Zabel
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-11 4:59 ` Masami Hiramatsu (Google)
2026-03-10 11:49 ` [PATCH 58/61] arch/x86: " Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:49 ` [PATCH 59/61] debugobjects: Drop likely() around !IS_ERR_OR_NULL() Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:49 ` [PATCH 60/61] Input alps: Drop unlikely() around IS_ERR_OR_NULL() Philipp Hahn
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 11:49 ` [PATCH 61/61] file: " Philipp Hahn
2026-03-10 12:23 ` Jeff Layton
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-10 14:14 ` [PATCH 00/61] treewide: Use IS_ERR_OR_NULL over manual NULL check - refactor Steven Rostedt
2026-03-10 14:23 ` Theodore Tso
2026-03-10 18:40 ` Kuan-Wei Chiu
2026-03-11 21:27 ` Claude review: " Claude Code Review Bot
2026-03-11 0:09 ` Russell King (Oracle)
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