[PATCH v5 1/6] seccomp: create internal mode-setting function

[Kees Cook <keescook@chromium.org>]

In preparation for having other callers of the seccomp mode setting
logic, split the prctl entry point away from the core logic that performs
seccomp mode setting.

Signed-off-by: Kees Cook <keescook@chromium.org>
---
 kernel/seccomp.c |   19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index b35c21503a36..8bbe20111222 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -465,7 +465,7 @@ long prctl_get_seccomp(void)
 }
 
 /**
- * prctl_set_seccomp: configures current->seccomp.mode
+ * seccomp_set_mode: internal function for setting seccomp mode
  * @seccomp_mode: requested mode to use
  * @filter: optional struct sock_fprog for use with SECCOMP_MODE_FILTER
  *
@@ -478,7 +478,7 @@ long prctl_get_seccomp(void)
  *
  * Returns 0 on success or -EINVAL on failure.
  */
-long prctl_set_seccomp(unsigned long seccomp_mode, char __user *filter)
+static long seccomp_set_mode(unsigned long seccomp_mode, char __user *filter)
 {
 	long ret = -EINVAL;
 
@@ -509,3 +509,18 @@ long prctl_set_seccomp(unsigned long seccomp_mode, char __user *filter)
 out:
 	return ret;
 }
+
+/**
+ * prctl_set_seccomp: configures current->seccomp.mode
+ * @seccomp_mode: requested mode to use
+ * @filter: optional struct sock_fprog for use with SECCOMP_MODE_FILTER
+ *
+ * Returns 0 on success or -EINVAL on failure.
+ */
+long prctl_set_seccomp(unsigned long seccomp_mode, char __user *filter)
+{
+	long ret;
+
+	ret = seccomp_set_mode(seccomp_mode, filter);
+	return ret;
+}
-- 
1.7.9.5