2022-09-19 12:13:26

by Yang Shen

[permalink] [raw]
Subject: [RFC PATCH 1/6] moduleparams: Add hexulong type parameter

Due to the bitmap.h uses a unsigned long pointer for bitmap variable,
Add an 'hexulong' is more convenient.

Signed-off-by: Yang Shen <[email protected]>
include/linux/moduleparam.h | 7 ++++++-
kernel/params.c | 1 +
2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index 962cd41a2cb5..9e0828fa3946 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -118,7 +118,7 @@ struct kparam_array
* you can create your own by defining those variables.
* Standard types are:
- * byte, hexint, short, ushort, int, uint, long, ulong
+ * byte, hexint, hexulong, short, ushort, int, uint, long, ulong
* charp: a character pointer
* bool: a bool, values 0/1, y/n, Y/N.
* invbool: the above, only sense-reversed (N = true).
@@ -455,6 +455,11 @@ extern int param_set_hexint(const char *val, const struct kernel_param *kp);
extern int param_get_hexint(char *buffer, const struct kernel_param *kp);
#define param_check_hexint(name, p) param_check_uint(name, p)

+extern const struct kernel_param_ops param_ops_hexulong;
+extern int param_set_hexulong(const char *val, const struct kernel_param *kp);
+extern int param_get_hexulong(char *buffer, const struct kernel_param *kp);
+#define param_check_hexulong(name, p) param_check_ulong(name, p)
extern const struct kernel_param_ops param_ops_charp;
extern int param_set_charp(const char *val, const struct kernel_param *kp);
extern int param_get_charp(char *buffer, const struct kernel_param *kp);
diff --git a/kernel/params.c b/kernel/params.c
index 5b92310425c5..f367f0c1f228 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -242,6 +242,7 @@ STANDARD_PARAM_DEF(long, long, "%li", kstrtol);
STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", kstrtoul);
STANDARD_PARAM_DEF(ullong, unsigned long long, "%llu", kstrtoull);
STANDARD_PARAM_DEF(hexint, unsigned int, "%#08x", kstrtouint);
+STANDARD_PARAM_DEF(hexulong, unsigned long, "%#016lx", kstrtoul);

int param_set_uint_minmax(const char *val, const struct kernel_param *kp,
unsigned int min, unsigned int max)