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Date: Fri, 1 Jul 2022 18:03:10 -0700 From: Roman Gushchin <roman.gushchin@...ux.dev> To: Andrew Morton <akpm@...ux-foundation.org>, kernel test robot <lkp@...el.com> Cc: virtualization@...ts.linux-foundation.org, usbb2k-api-dev@...gnu.org, tipc-discussion@...ts.sourceforge.net, target-devel@...r.kernel.org, sound-open-firmware@...a-project.org, samba-technical@...ts.samba.org, rds-devel@....oracle.com, patches@...nsource.cirrus.com, osmocom-net-gprs@...ts.osmocom.org, openipmi-developer@...ts.sourceforge.net, nvdimm@...ts.linux.dev, ntb@...ts.linux.dev, netfilter-devel@...r.kernel.org, netdev@...r.kernel.org, mjpeg-users@...ts.sourceforge.net, megaraidlinux.pdl@...adcom.com, linuxppc-dev@...ts.ozlabs.org, linux1394-devel@...ts.sourceforge.net, linux-x25@...r.kernel.org, linux-wpan@...r.kernel.org, linux-wireless@...r.kernel.org, linux-watchdog@...r.kernel.org, linux-usb@...r.kernel.org, linux-unionfs@...r.kernel.org, linux-tegra@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, linux-staging@...ts.linux.dev, linux-serial@...r.kernel.org, linux-sctp@...r.kernel.org, linux-scsi@...r.kernel.org, linux-samsung-soc@...r.kernel.org, linux-rockchip@...ts.infradead.org, linux-renesas-soc@...r.kernel.org, linux-rdma@...r.kernel.org, linux-raid@...r.kernel.org, linux-pm@...r.kernel.org, linux-phy@...ts.infradead.org, linux-perf-users@...r.kernel.org, linux-pci@...r.kernel.org, linux-parport@...ts.infradead.org, linux-parisc@...r.kernel.org, linux-omap@...r.kernel.org, linux-nfc@...ts.01.org, linux-mtd@...ts.infradead.org, linux-mmc@...r.kernel.org, linux-mm@...ck.org, linux-mediatek@...ts.infradead.org, linux-media@...r.kernel.org, linux-leds@...r.kernel.org, linux-integrity@...r.kernel.org, linux-input@...r.kernel.org, linux-iio@...r.kernel.org, linux-ide@...r.kernel.org, linux-hwmon@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-fpga@...r.kernel.org, linux-fbdev@...r.kernel.org, linux-ext4@...r.kernel.org, linux-efi@...r.kernel.org, linux-cxl@...r.kernel.org, linux-crypto@...r.kernel.org, linux-clk@...r.kernel.org, linux-cifs@...r.kernel.org, linux-btrfs@...r.kernel.org, linux-bluetooth@...r.kernel.org, linux-block@...r.kernel.org, linux-bcache@...r.kernel.org, linux-arm-msm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-amlogic@...ts.infradead.org, linaro-mm-sig@...ts.linaro.org, legousb-devel@...ts.sourceforge.net, kvm@...r.kernel.org, keyrings@...r.kernel.org, isdn4linux@...tserv.isdn4linux.de, iommu@...ts.linux.dev, iommu@...ts.linux-foundation.org, intel-wired-lan@...ts.osuosl.org, dri-devel@...ts.freedesktop.org, dm-devel@...hat.com, devicetree@...r.kernel.org, dev@...nvswitch.org, dccp@...r.kernel.org, damon@...ts.linux.dev, coreteam@...filter.org, cgroups@...r.kernel.org, ceph-devel@...r.kernel.org, apparmor@...ts.ubuntu.com, amd-gfx@...ts.freedesktop.org, alsa-devel@...a-project.org, accessrunner-general@...ts.sourceforge.net Subject: Re: [linux-next:master] BUILD REGRESSION 6cc11d2a1759275b856e464265823d94aabd5eaf esOn Fri, Jul 01, 2022 at 07:49:42AM +0800, kbuild test robot wrote: > tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > branch HEAD: 6cc11d2a1759275b856e464265823d94aabd5eaf Add linux-next specific files for 20220630 > > Error/Warning reports: > > https://lore.kernel.org/linux-mm/202206301859.UodBCrva-lkp@intel.com > > Error/Warning: (recently discovered and may have been fixed) > > arch/powerpc/kernel/interrupt.c:542:55: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body] > arch/powerpc/kernel/interrupt.c:542:55: warning: suggest braces around empty body in an 'if' statement [-Wempty-body] > drivers/pci/endpoint/functions/pci-epf-vntb.c:975:5: warning: no previous prototype for 'pci_read' [-Wmissing-prototypes] > drivers/pci/endpoint/functions/pci-epf-vntb.c:984:5: warning: no previous prototype for 'pci_write' [-Wmissing-prototypes] > mm/shrinker_debug.c:143:9: warning: function 'shrinker_debugfs_rename' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] > mm/shrinker_debug.c:217:9: warning: function 'shrinker_debugfs_rename' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] > mm/vmscan.c:637:9: warning: function 'prealloc_shrinker' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] > mm/vmscan.c:642:9: warning: function 'prealloc_shrinker' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] > mm/vmscan.c:697:9: warning: function 'register_shrinker' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] > mm/vmscan.c:702:9: warning: function 'register_shrinker' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] Shrinker-related warnings should be fixed by the following patch. Thanks! -- >From c399aff65c7745a209397a531c5b28fd404d83c2 Mon Sep 17 00:00:00 2001 From: Roman Gushchin <roman.gushchin@...ux.dev> Date: Fri, 1 Jul 2022 17:38:31 -0700 Subject: [PATCH] mm:shrinkers: fix build warnings Add __printf(a, b) attributes to shrinker functions taking shrinker name as an argument to avoid compiler warnings like: mm/shrinker_debug.c:143:9: warning: function 'shrinker_debugfs_rename' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] mm/shrinker_debug.c:217:9: warning: function 'shrinker_debugfs_rename' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] mm/vmscan.c:637:9: warning: function 'prealloc_shrinker' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] mm/vmscan.c:642:9: warning: function 'prealloc_shrinker' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] mm/vmscan.c:697:9: warning: function 'register_shrinker' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] mm/vmscan.c:702:9: warning: function 'register_shrinker' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] Signed-off-by: Roman Gushchin <roman.gushchin@...ux.dev> --- include/linux/shrinker.h | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index 64416f3e0a1f..08e6054e061f 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -93,9 +93,11 @@ struct shrinker { */ #define SHRINKER_NONSLAB (1 << 3) -extern int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...); +extern int __printf(2, 3) prealloc_shrinker(struct shrinker *shrinker, + const char *fmt, ...); extern void register_shrinker_prepared(struct shrinker *shrinker); -extern int register_shrinker(struct shrinker *shrinker, const char *fmt, ...); +extern int __printf(2, 3) register_shrinker(struct shrinker *shrinker, + const char *fmt, ...); extern void unregister_shrinker(struct shrinker *shrinker); extern void free_prealloced_shrinker(struct shrinker *shrinker); extern void synchronize_shrinkers(void); @@ -103,8 +105,8 @@ extern void synchronize_shrinkers(void); #ifdef CONFIG_SHRINKER_DEBUG extern int shrinker_debugfs_add(struct shrinker *shrinker); extern void shrinker_debugfs_remove(struct shrinker *shrinker); -extern int shrinker_debugfs_rename(struct shrinker *shrinker, - const char *fmt, ...); +extern int __printf(2, 3) shrinker_debugfs_rename(struct shrinker *shrinker, + const char *fmt, ...); #else /* CONFIG_SHRINKER_DEBUG */ static inline int shrinker_debugfs_add(struct shrinker *shrinker) { @@ -113,8 +115,8 @@ static inline int shrinker_debugfs_add(struct shrinker *shrinker) static inline void shrinker_debugfs_remove(struct shrinker *shrinker) { } -static inline int shrinker_debugfs_rename(struct shrinker *shrinker, - const char *fmt, ...) +static inline __printf(2, 3) +int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...) { return 0; } -- 2.36.1
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