diff options
| author | Sagi Grimberg <sagi@grimberg.me> | 2021-06-16 14:19:33 -0700 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-08-16 14:42:22 +0200 |
| commit | 2a14c9ae15a38148484a128b84bff7e9ffd90d68 (patch) | |
| tree | 6ff98acb5e26d5bf21c4e644ef8348b7a2dd7acc /kernel/params.c | |
| parent | 9ea9b9c48387edc101d56349492ad9c0492ff78d (diff) | |
| download | lwn-2a14c9ae15a38148484a128b84bff7e9ffd90d68.tar.gz lwn-2a14c9ae15a38148484a128b84bff7e9ffd90d68.zip | |
params: lift param_set_uint_minmax to common code
It is a useful helper hence move it to common code so others can enjoy
it.
Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'kernel/params.c')
| -rw-r--r-- | kernel/params.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/params.c b/kernel/params.c index 2daa2780a92c..8299bd764e42 100644 --- a/kernel/params.c +++ b/kernel/params.c @@ -243,6 +243,24 @@ 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); +int param_set_uint_minmax(const char *val, const struct kernel_param *kp, + unsigned int min, unsigned int max) +{ + unsigned int num; + int ret; + + if (!val) + return -EINVAL; + ret = kstrtouint(val, 0, &num); + if (ret) + return ret; + if (num < min || num > max) + return -EINVAL; + *((unsigned int *)kp->arg) = num; + return 0; +} +EXPORT_SYMBOL_GPL(param_set_uint_minmax); + int param_set_charp(const char *val, const struct kernel_param *kp) { if (strlen(val) > 1024) { |