From 56bfe55c3d765039eb2d03d129797e732dca8831 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?YC=E9=85=B1luyancib?= <luyancib@qq.com>
Date: Sun, 1 Jun 2025 00:55:22 +0800
Subject: [PATCH] Drop auto backport `path_umount` (#124)

Since https://github.com/backslashxx/KernelSU/commit/4f8943a and https://github.com/rsuntk/KernelSU/commit/0eab5ae , so auto backport `path_umount` is no longer needed.
---
 kernel/Makefile | 45 +--------------------------------------------
 1 file changed, 1 insertion(+), 44 deletions(-)

diff --git a/kernel/Makefile b/kernel/Makefile
index 78f117ff..e2ff25c2 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -123,50 +123,7 @@ ifeq ($(shell grep -q "CONFIG_KDP_CRED" $(srctree)/kernel/cred.c; echo $$?),0)
 ccflags-y += -DSAMSUNG_UH_DRIVER_EXIST
 endif
 
-ccflags-y += -DKSU_UMOUNT
-
-ifneq ($(shell grep -Eq "^static int can_umount" $(srctree)/fs/namespace.c; echo $$?),0)
-$(info -- SukiSU compat: adding function 'static int can_umount(const struct path *path, int flags);' to $(srctree)/fs/namespace.c)
-CAN_UMOUNT = static int can_umount(const struct path *path, int flags)\n\
-{\n\t\
-        struct mount *mnt = real_mount(path->mnt);\n\t\
-        if (flags & ~(MNT_FORCE | MNT_DETACH | MNT_EXPIRE | UMOUNT_NOFOLLOW))\n\t\t\
-                return -EINVAL;\n\t\
-        if (!may_mount())\n\t\t\
-                return -EPERM;\n\t\
-        if (path->dentry != path->mnt->mnt_root)\n\t\t\
-                return -EINVAL;\n\t\
-        if (!check_mnt(mnt))\n\t\t\
-                return -EINVAL;\n\t\
-        if (mnt->mnt.mnt_flags & MNT_LOCKED)\n\t\t\
-                return -EINVAL;\n\t\
-        if (flags & MNT_FORCE && !capable(CAP_SYS_ADMIN))\n\t\t\
-                return -EPERM;\n\t\
-        return 0;\n\
-}\n
-$(shell sed -i '/^static bool is_mnt_ns_file/i $(CAN_UMOUNT)' $(srctree)/fs/namespace.c;)
-endif
-
-ifneq ($(shell grep -Eq "^int path_umount" $(srctree)/fs/namespace.c; echo $$?),0)
-$(info -- SukiSU compat: adding function 'int path_umount(struct path *path, int flags);' to $(srctree)/fs/namespace.c)
-PATH_UMOUNT = int path_umount(struct path *path, int flags)\n\
-{\n\t\
-        struct mount *mnt = real_mount(path->mnt);\n\t\
-        int ret;\n\t\
-        ret = can_umount(path, flags);\n\t\
-        if (!ret)\n\t\t\
-                ret = do_umount(mnt, flags);\n\t\
-        dput(path->dentry);\n\t\
-        mntput_no_expire(mnt);\n\t\
-        return ret;\n\
-}\n
-$(shell sed -i '/^static bool is_mnt_ns_file/i $(PATH_UMOUNT)' $(srctree)/fs/namespace.c;)
-endif
-
-ifneq ($(shell grep -Eq "^int path_umount" $(srctree)/fs/internal.h; echo $$?),0)
-$(shell sed -i '/^extern void __init mnt_init/a int path_umount(struct path *path, int flags);' $(srctree)/fs/internal.h;)
-$(info -- SukiSU compat: adding 'int path_umount(struct path *path, int flags);' to $(srctree)/fs/internal.h)
-endif
+#ccflags-y += -DKSU_UMOUNT
 
 # Do checks before compile
 ifeq ($(shell grep -q "int\s\+\path_umount" $(srctree)/fs/namespace.c; echo $$?),0)