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cred: add prepare credential guard 

A lot of code uses the following pattern:

* prepare new credentials
* modify them for their use-case
* drop them

Support that easier with the new guard infrastructure.

Link: https://patch.msgid.link/20251103-work-creds-guards-prepare_creds-v1-1-b447b82f2c9b@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-11-03 15:57:27 +01:00
parent a85787996a
commit c8ad3098e1
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1 changed files with 5 additions and 0 deletions
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5
include/linux/cred.h
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@ -280,6 +280,11 @@ static inline void put_cred(const struct cred *cred)
put_cred_many(cred, 1);
}
DEFINE_CLASS(prepare_creds,
struct cred *,
if (_T) put_cred(_T),
prepare_creds(), void)
DEFINE_FREE(put_cred, struct cred *, if (!IS_ERR_OR_NULL(_T)) put_cred(_T))
/**