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Subject[PATCH v3 3/4] sysctl: allow to set extra1 to SYSCTL_ONE
Date
proc_do_static_key() does not consider the situation where a sysctl is only
allowed to be enabled and cannot be disabled under certain circumstances
since it set "->extra1" to SYSCTL_ZERO unconditionally. This patch add the
functionality to set "->extra1" accordingly.

Signed-off-by: Muchun Song <songmuchun@bytedance.com>
---
kernel/sysctl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 64065abf361e..ab3e9c937268 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1631,7 +1631,7 @@ int proc_do_static_key(struct ctl_table *table, int write,
.data = &val,
.maxlen = sizeof(val),
.mode = table->mode,
- .extra1 = SYSCTL_ZERO,
+ .extra1 = table->extra1 == SYSCTL_ONE ? SYSCTL_ONE : SYSCTL_ZERO,
.extra2 = SYSCTL_ONE,
};

--
2.11.0
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