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author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-13 21:43:59 +0100 |
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committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:16:03 +0200 |
commit | cbb60b924b9f3e4d7c67a1c9dcf981718f926e4e (patch) | |
tree | f3952696484e55feb05b862849d15740b87183a8 /fs/ioctl.c | |
parent | 454dab3f965ec24fda8fbe135c8dad4c5b238a86 (diff) | |
download | op-kernel-dev-cbb60b924b9f3e4d7c67a1c9dcf981718f926e4e.zip op-kernel-dev-cbb60b924b9f3e4d7c67a1c9dcf981718f926e4e.tar.gz |
fs: add ksys_ioctl() helper; remove in-kernel calls to sys_ioctl()
Using this helper allows us to avoid the in-kernel calls to the
sys_ioctl() syscall. The ksys_ prefix denotes that this function
is meant as a drop-in replacement for the syscall. In particular, it
uses the same calling convention as sys_ioctl().
After careful review, at least some of these calls could be converted
to do_vfs_ioctl() in future.
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: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'fs/ioctl.c')
-rw-r--r-- | fs/ioctl.c | 7 |
1 files changed, 6 insertions, 1 deletions
@@ -689,7 +689,7 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, return error; } -SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, unsigned long, arg) +int ksys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg) { int error; struct fd f = fdget(fd); @@ -702,3 +702,8 @@ SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, unsigned long, arg) fdput(f); return error; } + +SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd, unsigned long, arg) +{ + return ksys_ioctl(fd, cmd, arg); +} |