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ns: add __ns_ref_read() 

Implement ns_ref_read() the same way as ns_ref_{get,put}().
No point in making that any more special or different from the other
helpers.

Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-9-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-10-29 13:20:22 +01:00
parent 3dd50c5866
commit 6b053576ed
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1 changed files with 6 additions and 1 deletions
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7
include/linux/ns_common.h
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@ -154,7 +154,12 @@ static __always_inline __must_check bool __ns_ref_get(struct ns_common *ns)
return refcount_inc_not_zero(&ns->__ns_ref); return refcount_inc_not_zero(&ns->__ns_ref);
} }
#define ns_ref_read(__ns) refcount_read(&to_ns_common((__ns))->__ns_ref) static __always_inline __must_check int __ns_ref_read(const struct ns_common *ns)
{
return refcount_read(&ns->__ns_ref);
}
#define ns_ref_read(__ns) __ns_ref_read(to_ns_common((__ns)))
#define ns_ref_inc(__ns) refcount_inc(&to_ns_common((__ns))->__ns_ref) #define ns_ref_inc(__ns) refcount_inc(&to_ns_common((__ns))->__ns_ref)
#define ns_ref_get(__ns) __ns_ref_get(to_ns_common((__ns))) #define ns_ref_get(__ns) __ns_ref_get(to_ns_common((__ns)))
#define ns_ref_put(__ns) __ns_ref_put(to_ns_common((__ns))) #define ns_ref_put(__ns) __ns_ref_put(to_ns_common((__ns)))