diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-04-24 08:43:38 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-04-27 02:07:40 -0400 |
| commit | 32927393dc1ccd60fb2bdc05b9e8e88753761469 (patch) | |
| tree | c488a5564cdde7594c953219a98e22fb4865c812 /include/linux/mm.h | |
| parent | f461d2dcd511c020a26d4d791fae595c65ed09b6 (diff) | |
sysctl: pass kernel pointers to ->proc_handler
Instead of having all the sysctl handlers deal with user pointers, which
is rather hairy in terms of the BPF interaction, copy the input to and
from userspace in common code. This also means that the strings are
always NUL-terminated by the common code, making the API a little bit
safer.
As most handler just pass through the data to one of the common handlers
a lot of the changes are mechnical.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 9c4e7e76dedd..a7b1ef8ed970 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -201,10 +201,10 @@ extern int sysctl_overcommit_memory; extern int sysctl_overcommit_ratio; extern unsigned long sysctl_overcommit_kbytes; -extern int overcommit_ratio_handler(struct ctl_table *, int, void __user *, - size_t *, loff_t *); -extern int overcommit_kbytes_handler(struct ctl_table *, int, void __user *, - size_t *, loff_t *); +int overcommit_ratio_handler(struct ctl_table *, int, void *, size_t *, + loff_t *); +int overcommit_kbytes_handler(struct ctl_table *, int, void *, size_t *, + loff_t *); #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n)) @@ -2957,8 +2957,8 @@ extern bool process_shares_mm(struct task_struct *p, struct mm_struct *mm); #ifdef CONFIG_SYSCTL extern int sysctl_drop_caches; -int drop_caches_sysctl_handler(struct ctl_table *, int, - void __user *, size_t *, loff_t *); +int drop_caches_sysctl_handler(struct ctl_table *, int, void *, size_t *, + loff_t *); #endif void drop_slab(void); |