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| author | Joel Granados <joel.granados@kernel.org> | 2025-10-16 10:22:16 +0200 |
|---|---|---|
| committer | Joel Granados <joel.granados@kernel.org> | 2025-11-27 15:43:20 +0100 |
| commit | c3102febf43ba8a9ce5512a49103f42661659a16 (patch) | |
| tree | c2afa7aced9acfbd980e23f23db06b14b5e2e51d | |
| parent | 0c1d2dc7cce78445f723d32b57f430c42316cab0 (diff) | |
sysctl: Create macro for user-to-kernel uint converter
Replace sysctl_user_to_kern_uint_conv function with
SYSCTL_USER_TO_KERN_UINT_CONV macro that accepts u_ptr_op parameter for
value transformation. Replacing sysctl_kern_to_user_uint_conv is not
needed as it will only be used from within sysctl.c. This is a
preparation commit for creating a custom converter in fs/pipe.c. No
Functional changes are intended.
Signed-off-by: Joel Granados <joel.granados@kernel.org>
| -rw-r--r-- | kernel/sysctl.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 1e8d330a773d..00595b84beac 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -462,15 +462,19 @@ static SYSCTL_INT_CONV_CUSTOM(_ms_jiffies_minmax, sysctl_user_to_kern_int_conv_ms, sysctl_kern_to_user_int_conv_ms, true) -static int sysctl_user_to_kern_uint_conv(const unsigned long *u_ptr, - unsigned int *k_ptr) -{ - if (*u_ptr > UINT_MAX) - return -EINVAL; - WRITE_ONCE(*k_ptr, *u_ptr); - return 0; +#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) \ +{ \ + unsigned long u = u_ptr_op(*u_ptr); \ + if (u > UINT_MAX) \ + return -EINVAL; \ + WRITE_ONCE(*k_ptr, u); \ + return 0; \ } +static SYSCTL_USER_TO_KERN_UINT_CONV(, SYSCTL_CONV_IDENTITY) + static int sysctl_kern_to_user_uint_conv(unsigned long *u_ptr, const unsigned int *k_ptr) { |