It is trivial to directly call _do_fork() instead of the sys_clone() syscall in compat_sys_x86_clone().
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.ga17...@light.dominikbrodowski.net Cc: Ingo Molnar <mi...@redhat.com> Cc: Jiri Slaby <jsl...@suse.com> Cc: x...@kernel.org Reviewed-by: Thomas Gleixner <t...@linutronix.de> Signed-off-by: Dominik Brodowski <li...@dominikbrodowski.net> --- arch/x86/ia32/sys_ia32.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c index 6512498bbef6..aa024a2dd34f 100644 --- a/arch/x86/ia32/sys_ia32.c +++ b/arch/x86/ia32/sys_ia32.c @@ -41,6 +41,7 @@ #include <linux/highuid.h> #include <linux/sysctl.h> #include <linux/slab.h> +#include <linux/sched/task.h> #include <asm/mman.h> #include <asm/types.h> #include <linux/uaccess.h> @@ -241,6 +242,6 @@ COMPAT_SYSCALL_DEFINE5(x86_clone, unsigned long, clone_flags, unsigned long, newsp, int __user *, parent_tidptr, unsigned long, tls_val, int __user *, child_tidptr) { - return sys_clone(clone_flags, newsp, parent_tidptr, child_tidptr, + return _do_fork(clone_flags, newsp, 0, parent_tidptr, child_tidptr, tls_val); } -- 2.16.3
