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/vmstat.h | |
| parent | sysctl: avoid forward declarations (diff) | |
| download | wireguard-linux-32927393dc1ccd60fb2bdc05b9e8e88753761469.tar.xz wireguard-linux-32927393dc1ccd60fb2bdc05b9e8e88753761469.zip | |
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/vmstat.h')
| -rw-r--r-- | include/linux/vmstat.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index 292485f3d24d..cb507151710f 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -16,8 +16,8 @@ extern int sysctl_stat_interval; #define DISABLE_NUMA_STAT 0 extern int sysctl_vm_numa_stat; DECLARE_STATIC_KEY_TRUE(vm_numa_stat_key); -extern int sysctl_vm_numa_stat_handler(struct ctl_table *table, - int write, void __user *buffer, size_t *length, loff_t *ppos); +int sysctl_vm_numa_stat_handler(struct ctl_table *table, int write, + void *buffer, size_t *length, loff_t *ppos); #endif struct reclaim_stat { @@ -274,8 +274,8 @@ void cpu_vm_stats_fold(int cpu); void refresh_zone_stat_thresholds(void); struct ctl_table; -int vmstat_refresh(struct ctl_table *, int write, - void __user *buffer, size_t *lenp, loff_t *ppos); +int vmstat_refresh(struct ctl_table *, int write, void *buffer, size_t *lenp, + loff_t *ppos); void drain_zonestat(struct zone *zone, struct per_cpu_pageset *); |