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net: socket: add __sys_bind() helper; remove in-kernel call to syscall

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Using the net-internal helper __sys_bind() allows us to avoid the
internal calls to the sys_bind() syscall.

This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net

Cc: David S. Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski 2018-03-13 19:33:09 +01:00
parent 9d6a15c3f2
commit a87d35d87a
3 changed files with 9 additions and 3 deletions
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1
include/linux/socket.h
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@ -364,5 +364,6 @@ extern int __sys_sendto(int fd, void __user *buff, size_t len,
extern int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr,
int __user *upeer_addrlen, int flags);
extern int __sys_socket(int family, int type, int protocol);
extern int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen);
#endif /* _LINUX_SOCKET_H */