kernel: squash personal changes

ksu.c: disable KPROBES=n warning, its useless, filesystem hooks are in use.
core_hook.c: umount /system/etc/hosts (tiann#1494)
Makefile: hardcode ksu version

kernel/Makefile

@@ -18,18 +18,10 @@ ccflags-y += -I$(objtree)/security/selinux -include $(srctree)/include/uapi/asm-
 
 obj-$(CONFIG_KSU) += kernelsu.o
 
-# .git is a text file while the module is imported by 'git submodule add'.
-ifeq ($(shell test -e $(srctree)/$(src)/../.git; echo $$?),0)
-$(shell cd $(srctree)/$(src); /usr/bin/env PATH="$$PATH":/usr/bin:/usr/local/bin [ -f ../.git/shallow ] && git fetch --unshallow)
-KSU_GIT_VERSION := $(shell cd $(srctree)/$(src); /usr/bin/env PATH="$$PATH":/usr/bin:/usr/local/bin git rev-list --count HEAD)
-# ksu_version: major * 10000 + git version + 200 for historical reasons
-$(eval KSU_VERSION=$(shell expr 10000 + $(KSU_GIT_VERSION) + 200))
+# hardcode!
+$(eval KSU_VERSION=11675)
 $(info -- KernelSU version: $(KSU_VERSION))
 ccflags-y += -DKSU_VERSION=$(KSU_VERSION)
-else # If there is no .git file, the default version will be passed.
-$(warning "KSU_GIT_VERSION not defined! It is better to make KernelSU a git submodule!")
-ccflags-y += -DKSU_VERSION=16
-endif
 
 ifeq ($(shell grep -q " current_sid(void)" $(srctree)/security/selinux/include/objsec.h; echo $$?),0)
 ccflags-y += -DKSU_COMPAT_HAS_CURRENT_SID

kernel/core_hook.c

@@ -612,6 +612,9 @@ int ksu_handle_setuid(struct cred *new, const struct cred *old)
 	// try umount ksu temp path
 	try_umount("/debug_ramdisk", false, MNT_DETACH);
 	try_umount("/sbin", false, MNT_DETACH);
+
+	// try umount /system/etc/hosts (for bindhosts)
+	try_umount("/system/etc/hosts", false, MNT_DETACH);
 
 	return 0;
 }

kernel/ksu.c

@@ -59,7 +59,6 @@ int __init kernelsu_init(void)
 	ksu_enable_sucompat();
 	ksu_enable_ksud();
 #else
-	pr_alert("KPROBES is disabled, KernelSU may not work, please check https://kernelsu.org/guide/how-to-integrate-for-non-gki.html");
 #endif
 
 #ifdef MODULE