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params: lift param_set_uint_minmax to common code

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[ Upstream commit 2a14c9ae15a38148484a128b84bff7e9ffd90d68 ]

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>
Stable-dep-of: 3ebc46ca8675 ("tcp: Fix shift-out-of-bounds in dctcp_update_alpha().")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sagi Grimberg
2021-06-16 14:19:33 -07:00
committed by Greg Kroah-Hartman
parent afd5730969
commit 459de98d7a
3 changed files with 20 additions and 18 deletions
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18
kernel/params.c
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@@ -245,6 +245,24 @@ STANDARD_PARAM_DEF(long, long, "%li", kstrtol);
STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", kstrtoul);
STANDARD_PARAM_DEF(ullong, unsigned long long, "%llu", kstrtoull);
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) {