Wrap sysctl converter macros with CONFIG_PROC_SYSCTL conditional
compilation. When CONFIG_PROC_SYSCTL is disabled, provide stub
implementations that return -ENOSYS to prevent link errors while
maintaining API compatibility.
This ensures converter macros are only compiled when procfs sysctl
support is enabled in the kernel configuration.
Signed-off-by: Joel Granados <joel.granados@kernel.org>
---
include/linux/sysctl.h | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 288fe0055cd5f7bd670a4e9797cc0595f4060e5f..0a64212a0ceb8454ae343831739831a092b6e693 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -73,6 +73,7 @@ extern const int sysctl_vals[];
#define SYSCTL_USER_TO_KERN(dir) (!!(dir))
#define SYSCTL_KERN_TO_USER(dir) (!dir)
+#ifdef CONFIG_PROC_SYSCTL
#define SYSCTL_USER_TO_KERN_INT_CONV(name, u_ptr_op) \
int sysctl_user_to_kern_int_conv##name(const bool *negp, \
const unsigned long *u_ptr,\
@@ -173,6 +174,48 @@ int do_proc_uint_conv##name(unsigned long *u_ptr, unsigned int *k_ptr, \
return 0; \
}
+#else // CONFIG_PROC_SYSCTL
+#define SYSCTL_USER_TO_KERN_INT_CONV(name, u_ptr_op) \
+int sysctl_user_to_kern_int_conv##name(const bool *negp, \
+ const unsigned long *u_ptr,\
+ int *k_ptr) \
+{ \
+ return -ENOSYS; \
+}
+
+#define SYSCTL_KERN_TO_USER_INT_CONV(name, k_ptr_op) \
+int sysctl_kern_to_user_int_conv##name(bool *negp, \
+ unsigned long *u_ptr, \
+ const int *k_ptr) \
+{ \
+ return -ENOSYS; \
+}
+
+#define SYSCTL_INT_CONV_CUSTOM(name, user_to_kern, kern_to_user, \
+ k_ptr_range_check) \
+int do_proc_int_conv##name(bool *negp, unsigned long *u_ptr, int *k_ptr,\
+ int dir, const struct ctl_table *tbl) \
+{ \
+ return -ENOSYS; \
+}
+
+#define SYSCTL_USER_TO_KERN_UINT_CONV(name, u_ptr_op) \
+int sysctl_user_to_kern_uint_conv##name(const unsigned long *u_ptr,\
+ unsigned int *k_ptr) \
+{ \
+ return -ENOSYS; \
+}
+
+#define SYSCTL_UINT_CONV_CUSTOM(name, user_to_kern, kern_to_user, \
+ k_ptr_range_check) \
+int do_proc_uint_conv##name(unsigned long *u_ptr, unsigned int *k_ptr, \
+ int dir, const struct ctl_table *tbl) \
+{ \
+ return -ENOSYS; \
+}
+
+#endif // CONFIG_PROC_SYSCTL
+
extern const unsigned long sysctl_long_vals[];
--
2.50.1