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authorSuren Baghdasaryan <surenb@google.com>2022-01-29 13:41:20 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-30 09:56:58 +0200
commit44585f7bc0cb01095bc2ad4258049c02bbad21ef (patch)
tree64747d2fd2e0a9f9436e2be98e82ef684900ef76
parent51e50fbd3efc6064c30ed73a5e009018b36e290a (diff)
downloadlwn-44585f7bc0cb01095bc2ad4258049c02bbad21ef.tar.gz
lwn-44585f7bc0cb01095bc2ad4258049c02bbad21ef.zip
psi: fix "defined but not used" warnings when CONFIG_PROC_FS=n
When CONFIG_PROC_FS is disabled psi code generates the following warnings: kernel/sched/psi.c:1364:30: warning: 'psi_cpu_proc_ops' defined but not used [-Wunused-const-variable=] 1364 | static const struct proc_ops psi_cpu_proc_ops = { | ^~~~~~~~~~~~~~~~ kernel/sched/psi.c:1355:30: warning: 'psi_memory_proc_ops' defined but not used [-Wunused-const-variable=] 1355 | static const struct proc_ops psi_memory_proc_ops = { | ^~~~~~~~~~~~~~~~~~~ kernel/sched/psi.c:1346:30: warning: 'psi_io_proc_ops' defined but not used [-Wunused-const-variable=] 1346 | static const struct proc_ops psi_io_proc_ops = { | ^~~~~~~~~~~~~~~ Make definitions of these structures and related functions conditional on CONFIG_PROC_FS config. Link: https://lkml.kernel.org/r/20220119223940.787748-3-surenb@google.com Fixes: 0e94682b73bf ("psi: introduce psi monitor") Signed-off-by: Suren Baghdasaryan <surenb@google.com> Reported-by: kernel test robot <lkp@intel.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--kernel/sched/psi.c79
1 files changed, 41 insertions, 38 deletions
diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index c137c4d6983e..e14358178849 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -1082,44 +1082,6 @@ int psi_show(struct seq_file *m, struct psi_group *group, enum psi_res res)
return 0;
}
-static int psi_io_show(struct seq_file *m, void *v)
-{
- return psi_show(m, &psi_system, PSI_IO);
-}
-
-static int psi_memory_show(struct seq_file *m, void *v)
-{
- return psi_show(m, &psi_system, PSI_MEM);
-}
-
-static int psi_cpu_show(struct seq_file *m, void *v)
-{
- return psi_show(m, &psi_system, PSI_CPU);
-}
-
-static int psi_open(struct file *file, int (*psi_show)(struct seq_file *, void *))
-{
- if (file->f_mode & FMODE_WRITE && !capable(CAP_SYS_RESOURCE))
- return -EPERM;
-
- return single_open(file, psi_show, NULL);
-}
-
-static int psi_io_open(struct inode *inode, struct file *file)
-{
- return psi_open(file, psi_io_show);
-}
-
-static int psi_memory_open(struct inode *inode, struct file *file)
-{
- return psi_open(file, psi_memory_show);
-}
-
-static int psi_cpu_open(struct inode *inode, struct file *file)
-{
- return psi_open(file, psi_cpu_show);
-}
-
struct psi_trigger *psi_trigger_create(struct psi_group *group,
char *buf, size_t nbytes, enum psi_res res)
{
@@ -1278,6 +1240,45 @@ __poll_t psi_trigger_poll(void **trigger_ptr,
return ret;
}
+#ifdef CONFIG_PROC_FS
+static int psi_io_show(struct seq_file *m, void *v)
+{
+ return psi_show(m, &psi_system, PSI_IO);
+}
+
+static int psi_memory_show(struct seq_file *m, void *v)
+{
+ return psi_show(m, &psi_system, PSI_MEM);
+}
+
+static int psi_cpu_show(struct seq_file *m, void *v)
+{
+ return psi_show(m, &psi_system, PSI_CPU);
+}
+
+static int psi_open(struct file *file, int (*psi_show)(struct seq_file *, void *))
+{
+ if (file->f_mode & FMODE_WRITE && !capable(CAP_SYS_RESOURCE))
+ return -EPERM;
+
+ return single_open(file, psi_show, NULL);
+}
+
+static int psi_io_open(struct inode *inode, struct file *file)
+{
+ return psi_open(file, psi_io_show);
+}
+
+static int psi_memory_open(struct inode *inode, struct file *file)
+{
+ return psi_open(file, psi_memory_show);
+}
+
+static int psi_cpu_open(struct inode *inode, struct file *file)
+{
+ return psi_open(file, psi_cpu_show);
+}
+
static ssize_t psi_write(struct file *file, const char __user *user_buf,
size_t nbytes, enum psi_res res)
{
@@ -1392,3 +1393,5 @@ static int __init psi_proc_init(void)
return 0;
}
module_init(psi_proc_init);
+
+#endif /* CONFIG_PROC_FS */