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authorJoel Granados <j.granados@samsung.com>2024-07-24 20:59:29 +0200
committerJoel Granados <j.granados@samsung.com>2024-07-24 20:59:29 +0200
commit78eb4ea25cd5fdbdae7eb9fdf87b99195ff67508 (patch)
tree823f8dd45600d746e38f112803e211a7c9893e89 /kernel/events
parent7a3fad30fd8b4b5e370906b3c554f64026f56c2f (diff)
sysctl: treewide: constify the ctl_table argument of proc_handlers
const qualify the struct ctl_table argument in the proc_handler function signatures. This is a prerequisite to moving the static ctl_table structs into .rodata data which will ensure that proc_handler function pointers cannot be modified. This patch has been generated by the following coccinelle script: ``` virtual patch @r1@ identifier ctl, write, buffer, lenp, ppos; identifier func !~ "appldata_(timer|interval)_handler|sched_(rt|rr)_handler|rds_tcp_skbuf_handler|proc_sctp_do_(hmac_alg|rto_min|rto_max|udp_port|alpha_beta|auth|probe_interval)"; @@ int func( - struct ctl_table *ctl + const struct ctl_table *ctl ,int write, void *buffer, size_t *lenp, loff_t *ppos); @r2@ identifier func, ctl, write, buffer, lenp, ppos; @@ int func( - struct ctl_table *ctl + const struct ctl_table *ctl ,int write, void *buffer, size_t *lenp, loff_t *ppos) { ... } @r3@ identifier func; @@ int func( - struct ctl_table * + const struct ctl_table * ,int , void *, size_t *, loff_t *); @r4@ identifier func, ctl; @@ int func( - struct ctl_table *ctl + const struct ctl_table *ctl ,int , void *, size_t *, loff_t *); @r5@ identifier func, write, buffer, lenp, ppos; @@ int func( - struct ctl_table * + const struct ctl_table * ,int write, void *buffer, size_t *lenp, loff_t *ppos); ``` * Code formatting was adjusted in xfs_sysctl.c to comply with code conventions. The xfs_stats_clear_proc_handler, xfs_panic_mask_proc_handler and xfs_deprecated_dointvec_minmax where adjusted. * The ctl_table argument in proc_watchdog_common was const qualified. This is called from a proc_handler itself and is calling back into another proc_handler, making it necessary to change it as part of the proc_handler migration. Co-developed-by: Thomas Weißschuh <linux@weissschuh.net> Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Co-developed-by: Joel Granados <j.granados@samsung.com> Signed-off-by: Joel Granados <j.granados@samsung.com>
Diffstat (limited to 'kernel/events')
-rw-r--r--kernel/events/callchain.c2
-rw-r--r--kernel/events/core.c4
2 files changed, 3 insertions, 3 deletions
diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c
index 8d57255e5b29..8a47e52a454f 100644
--- a/kernel/events/callchain.c
+++ b/kernel/events/callchain.c
@@ -270,7 +270,7 @@ exit_put:
* Used for sysctl_perf_event_max_stack and
* sysctl_perf_event_max_contexts_per_stack.
*/
-int perf_event_max_stack_handler(struct ctl_table *table, int write,
+int perf_event_max_stack_handler(const struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int *value = table->data;
diff --git a/kernel/events/core.c b/kernel/events/core.c
index af2e3a06b239..0d9c4985b0aa 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -450,7 +450,7 @@ static void update_perf_cpu_limits(void)
static bool perf_rotate_context(struct perf_cpu_pmu_context *cpc);
-int perf_event_max_sample_rate_handler(struct ctl_table *table, int write,
+int perf_event_max_sample_rate_handler(const struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int ret;
@@ -474,7 +474,7 @@ int perf_event_max_sample_rate_handler(struct ctl_table *table, int write,
int sysctl_perf_cpu_time_max_percent __read_mostly = DEFAULT_CPU_TIME_MAX_PERCENT;
-int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write,
+int perf_cpu_time_max_percent_handler(const struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);