Merge branch 'hch.init_path' of git://git.kernel.org/pub/scm/linux/ke…

…rnel/git/viro/vfs Pull init and set_fs() cleanups from Al Viro: "Christoph's 'getting rid of ksys_...() uses under KERNEL_DS' series" * 'hch.init_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (50 commits) init: add an init_dup helper init: add an init_utimes helper init: add an init_stat helper init: add an init_mknod helper init: add an init_mkdir helper init: add an init_symlink helper init: add an init_link helper init: add an init_eaccess helper init: add an init_chmod helper init: add an init_chown helper init: add an init_chroot helper init: add an init_chdir helper init: add an init_rmdir helper init: add an init_unlink helper init: add an init_umount helper init: add an init_mount helper init: mark create_dev as __init init: mark console_on_rootfs as __init init: initialize ramdisk_execute_command at compile time devtmpfs: refactor devtmpfsd() ...
kawasaki · Aug 7, 2020 · e1ec517 · e1ec517
2 parents 19b39c3 + f073531
commit e1ec517
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Showing 35 changed files with 796 additions and 768 deletions.
diff --git a/arch/arm/kernel/atags_parse.c b/arch/arm/kernel/atags_parse.c
@@ -91,8 +91,6 @@ __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
 static int __init parse_tag_ramdisk(const struct tag *tag)
 {
 	rd_image_start = tag->u.ramdisk.start;
-	rd_doload = (tag->u.ramdisk.flags & 1) == 0;
-	rd_prompt = (tag->u.ramdisk.flags & 2) == 0;
 
 	if (tag->u.ramdisk.size)
 		rd_size = tag->u.ramdisk.size;

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
@@ -290,8 +290,6 @@ void __init setup_arch(char **cmdline_p)
 
 #ifdef CONFIG_BLK_DEV_RAM
 	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
-	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
-	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
 #endif
 
 	if (!MOUNT_ROOT_RDONLY)

diff --git a/arch/sparc/kernel/setup_32.c b/arch/sparc/kernel/setup_32.c
@@ -353,8 +353,6 @@ void __init setup_arch(char **cmdline_p)
 	ROOT_DEV = old_decode_dev(root_dev);
 #ifdef CONFIG_BLK_DEV_RAM
 	rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
-	rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
-	rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);	
 #endif
 
 	prom_setsync(prom_sync_me);

diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
@@ -659,8 +659,6 @@ void __init setup_arch(char **cmdline_p)
 	ROOT_DEV = old_decode_dev(root_dev);
 #ifdef CONFIG_BLK_DEV_RAM
 	rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
-	rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
-	rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
 #endif
 
 	task_thread_info(&init_task)->kregs = &fake_swapper_regs;

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
@@ -870,8 +870,6 @@ void __init setup_arch(char **cmdline_p)
 
 #ifdef CONFIG_BLK_DEV_RAM
 	rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
-	rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
-	rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
 #endif
 #ifdef CONFIG_EFI
 	if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,

diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
@@ -25,6 +25,7 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/kthread.h>
+#include <linux/init_syscalls.h>
 #include <uapi/linux/mount.h>
 #include "base.h"
 
@@ -359,7 +360,7 @@ int __init devtmpfs_mount(void)
 	if (!thread)
 		return 0;
 
-	err = do_mount("devtmpfs", "dev", "devtmpfs", MS_SILENT, NULL);
+	err = init_mount("devtmpfs", "dev", "devtmpfs", MS_SILENT, NULL);
 	if (err)
 		printk(KERN_INFO "devtmpfs: error mounting %i\n", err);
 	else
@@ -378,30 +379,8 @@ static int handle(const char *name, umode_t mode, kuid_t uid, kgid_t gid,
 		return handle_remove(name, dev);
 }
 
-static int devtmpfs_setup(void *p)
+static void __noreturn devtmpfs_work_loop(void)
 {
-	int err;
-
-	err = ksys_unshare(CLONE_NEWNS);
-	if (err)
-		goto out;
-	err = do_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, NULL);
-	if (err)
-		goto out;
-	ksys_chdir("/.."); /* will traverse into overmounted root */
-	ksys_chroot(".");
-out:
-	*(int *)p = err;
-	complete(&setup_done);
-	return err;
-}
-
-static int devtmpfsd(void *p)
-{
-	int err = devtmpfs_setup(p);
-
-	if (err)
-		return err;
 	while (1) {
 		spin_lock(&req_lock);
 		while (requests) {
@@ -421,6 +400,38 @@ static int devtmpfsd(void *p)
 		spin_unlock(&req_lock);
 		schedule();
 	}
+}
+
+static int __init devtmpfs_setup(void *p)
+{
+	int err;
+
+	err = ksys_unshare(CLONE_NEWNS);
+	if (err)
+		goto out;
+	err = init_mount("devtmpfs", "/", "devtmpfs", MS_SILENT, NULL);
+	if (err)
+		goto out;
+	init_chdir("/.."); /* will traverse into overmounted root */
+	init_chroot(".");
+out:
+	*(int *)p = err;
+	complete(&setup_done);
+	return err;
+}
+
+/*
+ * The __ref is because devtmpfs_setup needs to be __init for the routines it
+ * calls.  That call is done while devtmpfs_init, which is marked __init,
+ * synchronously waits for it to complete.
+ */
+static int __ref devtmpfsd(void *p)
+{
+	int err = devtmpfs_setup(p);
+
+	if (err)
+		return err;
+	devtmpfs_work_loop();
 	return 0;
 }
 

diff --git a/drivers/md/Makefile b/drivers/md/Makefile
@@ -43,6 +43,9 @@ obj-$(CONFIG_MD_FAULTY)		+= faulty.o
 obj-$(CONFIG_MD_CLUSTER)	+= md-cluster.o
 obj-$(CONFIG_BCACHE)		+= bcache/
 obj-$(CONFIG_BLK_DEV_MD)	+= md-mod.o
+ifeq ($(CONFIG_BLK_DEV_MD),y)
+obj-y				+= md-autodetect.o
+endif
 obj-$(CONFIG_BLK_DEV_DM)	+= dm-mod.o
 obj-$(CONFIG_BLK_DEV_DM_BUILTIN) += dm-builtin.o
 obj-$(CONFIG_DM_UNSTRIPED)	+= dm-unstripe.o