From: Arnd Bergmann <arnd@arndb.de> mainline inclusion from mainline-v6.5-rc6 commit a57c27c7ad85c420b7de44c6ee56692d51709dda category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I7U9J3 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... --------------------------- The newly added function has two definitions but no prototypes: drivers/base/cpu.c:605:16: error: no previous prototype for 'cpu_show_gds' [-Werror=missing-prototypes] Add a declaration next to the other ones for this file to avoid the warning. Fixes: 8974eb588283b ("x86/speculation: Add Gather Data Sampling mitigation") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Tested-by: Daniel Sneddon <daniel.sneddon@linux.intel.com> Cc: stable@kernel.org Link: https://lore.kernel.org/all/20230809130530.1913368-1-arnd%40kernel.org Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- include/linux/cpu.h | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/include/linux/cpu.h b/include/linux/cpu.h index 24e5f237244d..224a3acc2b66 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -2,14 +2,14 @@ /* * include/linux/cpu.h - generic cpu definition * - * This is mainly for topological representation. We define the - * basic 'struct cpu' here, which can be embedded in per-arch + * This is mainly for topological representation. We define the + * basic 'struct cpu' here, which can be embedded in per-arch * definitions of processors. * * Basic handling of the devices is done in drivers/base/cpu.c * * CPUs are exported via sysfs in the devices/system/cpu - * directory. + * directory. */ #ifndef _LINUX_CPU_H_ #define _LINUX_CPU_H_ @@ -70,6 +70,8 @@ extern ssize_t cpu_show_mmio_stale_data(struct device *dev, char *buf); extern ssize_t cpu_show_retbleed(struct device *dev, struct device_attribute *attr, char *buf); +extern ssize_t cpu_show_gds(struct device *dev, + struct device_attribute *attr, char *buf); extern __printf(4, 5) struct device *cpu_device_create(struct device *parent, void *drvdata, -- 2.25.1