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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-13 21:34:04 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:16:02 +0200
commit454dab3f965ec24fda8fbe135c8dad4c5b238a86 (patch)
treeed786624d90375f37d0eedb1dae0a45b02fc3572 /fs/readdir.c
parentfs: add ksys_open() wrapper; remove in-kernel calls to sys_open() (diff)
downloadlinux-454dab3f965ec24fda8fbe135c8dad4c5b238a86.tar.xz
linux-454dab3f965ec24fda8fbe135c8dad4c5b238a86.zip
fs: add ksys_getdents64() helper; remove in-kernel calls to sys_getdents64()
Using this helper allows us to avoid the in-kernel calls to the sys_getdents64() 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_getdents64(). 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/readdir.c')
-rw-r--r--fs/readdir.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/readdir.c b/fs/readdir.c
index 1b83b0ad183b..d97f548e6323 100644
--- a/fs/readdir.c
+++ b/fs/readdir.c
@@ -292,8 +292,8 @@ efault:
return -EFAULT;
}
-SYSCALL_DEFINE3(getdents64, unsigned int, fd,
- struct linux_dirent64 __user *, dirent, unsigned int, count)
+int ksys_getdents64(unsigned int fd, struct linux_dirent64 __user *dirent,
+ unsigned int count)
{
struct fd f;
struct linux_dirent64 __user * lastdirent;
@@ -326,6 +326,13 @@ SYSCALL_DEFINE3(getdents64, unsigned int, fd,
return error;
}
+
+SYSCALL_DEFINE3(getdents64, unsigned int, fd,
+ struct linux_dirent64 __user *, dirent, unsigned int, count)
+{
+ return ksys_getdents64(fd, dirent, count);
+}
+
#ifdef CONFIG_COMPAT
struct compat_old_linux_dirent {
compat_ulong_t d_ino;