mars/pre-patches/vanilla-4.14/0001-mars-minimum-pre-patch-for-mars.patch

From 1be1b148afba0f905afcb13e0ee18e1333eac9d1 Mon Sep 17 00:00:00 2001
From: Thomas Schoebel-Theuer <tst@1und1.de>
Date: Thu, 30 Jan 2020 13:41:29 +0100
Subject: [PATCH] mars: minimum pre-patch for mars

Mostly introduces some EXPORT_SYMBOL().
Should have almost no impact onto the kernel.
---
 fs/aio.c                   | 6 ++++++
 fs/namei.c                 | 5 +++++
 fs/open.c                  | 2 ++
 fs/utimes.c                | 2 ++
 include/linux/aio.h        | 1 +
 include/uapi/linux/major.h | 1 +
 mm/page_alloc.c            | 2 ++
 7 files changed, 19 insertions(+)

diff --git a/fs/aio.c b/fs/aio.c
index a2de58f77338..c9beeabfceef 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -194,6 +194,7 @@ struct aio_kiocb {
 static DEFINE_SPINLOCK(aio_nr_lock);
 unsigned long aio_nr;		/* current system wide number of aio requests */
 unsigned long aio_max_nr = 0x10000; /* system wide maximum number of aio requests */
+EXPORT_SYMBOL_GPL(aio_max_nr);
 /*----end sysctl variables---*/
 
 static struct kmem_cache	*kiocb_cachep;
@@ -1397,6 +1398,7 @@ SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
 out:
 	return ret;
 }
+EXPORT_SYMBOL(sys_io_setup);
 
 #ifdef CONFIG_COMPAT
 COMPAT_SYSCALL_DEFINE2(io_setup, unsigned, nr_events, u32 __user *, ctx32p)
@@ -1466,6 +1468,7 @@ SYSCALL_DEFINE1(io_destroy, aio_context_t, ctx)
 	pr_debug("EINVAL: invalid context id\n");
 	return -EINVAL;
 }
+EXPORT_SYMBOL(sys_io_destroy);
 
 static int aio_setup_rw(int rw, struct iocb *iocb, struct iovec **iovec,
 		bool vectored, bool compat, struct iov_iter *iter)
@@ -1715,6 +1718,7 @@ static long do_io_submit(aio_context_t ctx_id, long nr,
 	percpu_ref_put(&ctx->users);
 	return i ? i : ret;
 }
+EXPORT_SYMBOL(sys_io_submit);
 
 /* sys_io_submit:
  *	Queue the nr iocbs pointed to by iocbpp for processing.  Returns
@@ -1842,6 +1846,7 @@ SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
 
 	return ret;
 }
+EXPORT_SYMBOL(sys_io_cancel);
 
 /* io_getevents:
  *	Attempts to read at least min_nr events and up to nr events from
@@ -1871,6 +1876,7 @@ SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
 	}
 	return ret;
 }
+EXPORT_SYMBOL(sys_io_getevents);
 
 #ifdef CONFIG_COMPAT
 COMPAT_SYSCALL_DEFINE5(io_getevents, compat_aio_context_t, ctx_id,
diff --git a/fs/namei.c b/fs/namei.c
index d648d6d2b635..7cf8cfcaca53 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3882,6 +3882,7 @@ SYSCALL_DEFINE2(mkdir, const char __user *, pathname, umode_t, mode)
 {
 	return sys_mkdirat(AT_FDCWD, pathname, mode);
 }
+EXPORT_SYMBOL(sys_mkdir);
 
 int vfs_rmdir(struct inode *dir, struct dentry *dentry)
 {
@@ -3985,6 +3986,7 @@ SYSCALL_DEFINE1(rmdir, const char __user *, pathname)
 {
 	return do_rmdir(AT_FDCWD, pathname);
 }
+EXPORT_SYMBOL(sys_rmdir);
 
 /**
  * vfs_unlink - unlink a filesystem object
@@ -4138,6 +4140,7 @@ SYSCALL_DEFINE1(unlink, const char __user *, pathname)
 {
 	return do_unlinkat(AT_FDCWD, pathname);
 }
+EXPORT_SYMBOL(sys_unlink);
 
 int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname)
 {
@@ -4195,6 +4198,7 @@ SYSCALL_DEFINE2(symlink, const char __user *, oldname, const char __user *, newn
 {
 	return sys_symlinkat(oldname, AT_FDCWD, newname);
 }
+EXPORT_SYMBOL(sys_symlink);
 
 /**
  * vfs_link - create a new link
@@ -4683,6 +4687,7 @@ SYSCALL_DEFINE2(rename, const char __user *, oldname, const char __user *, newna
 {
 	return sys_renameat2(AT_FDCWD, oldname, AT_FDCWD, newname, 0);
 }
+EXPORT_SYMBOL(sys_rename);
 
 int vfs_whiteout(struct inode *dir, struct dentry *dentry)
 {
diff --git a/fs/open.c b/fs/open.c
index 29a2cdcbcb17..a6e0eb8c9db9 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -595,6 +595,7 @@ SYSCALL_DEFINE2(chmod, const char __user *, filename, umode_t, mode)
 {
 	return sys_fchmodat(AT_FDCWD, filename, mode);
 }
+EXPORT_SYMBOL(sys_chmod);
 
 static int chown_common(const struct path *path, uid_t user, gid_t group)
 {
@@ -680,6 +681,7 @@ SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group
 	return sys_fchownat(AT_FDCWD, filename, user, group,
 			    AT_SYMLINK_NOFOLLOW);
 }
+EXPORT_SYMBOL(sys_lchown);
 
 SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
 {
diff --git a/fs/utimes.c b/fs/utimes.c
index e4b3d7c2c9f5..e24cfb5e9c5c 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <linux/module.h>
 #include <linux/file.h>
 #include <linux/mount.h>
 #include <linux/namei.h>
@@ -164,6 +165,7 @@ long do_utimes(int dfd, const char __user *filename, struct timespec64 *times,
 out:
 	return error;
 }
+EXPORT_SYMBOL(do_utimes);
 
 SYSCALL_DEFINE4(utimensat, int, dfd, const char __user *, filename,
 		struct timespec __user *, utimes, int, flags)
diff --git a/include/linux/aio.h b/include/linux/aio.h
index 9d8aabecfe2d..078612c87c56 100644
--- a/include/linux/aio.h
+++ b/include/linux/aio.h
@@ -14,6 +14,7 @@ typedef int (kiocb_cancel_fn)(struct kiocb *);
 
 /* prototypes */
 #ifdef CONFIG_AIO
+#define HAS_AIO_MAX
 extern void exit_aio(struct mm_struct *mm);
 void kiocb_set_cancel_fn(struct kiocb *req, kiocb_cancel_fn *cancel);
 #else
diff --git a/include/uapi/linux/major.h b/include/uapi/linux/major.h
index 7e5fa8e15c43..edfbce01e4ac 100644
--- a/include/uapi/linux/major.h
+++ b/include/uapi/linux/major.h
@@ -149,6 +149,7 @@
 #define UNIX98_PTY_SLAVE_MAJOR	(UNIX98_PTY_MASTER_MAJOR+UNIX98_PTY_MAJOR_COUNT)
 
 #define DRBD_MAJOR		147
+#define MARS_MAJOR		148
 #define RTF_MAJOR		150
 #define RAW_MAJOR		162
 
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6f71518a4558..433fbb7d10a6 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -259,6 +259,7 @@ compound_page_dtor * const compound_page_dtors[] = {
 };
 
 int min_free_kbytes = 1024;
+EXPORT_SYMBOL(min_free_kbytes);
 int user_min_free_kbytes = -1;
 int watermark_scale_factor = 10;
 
@@ -6947,6 +6948,7 @@ static void __setup_per_zone_wmarks(void)
 	/* update totalreserve_pages */
 	calculate_totalreserve_pages();
 }
+EXPORT_SYMBOL(setup_per_zone_wmarks);
 
 /**
  * setup_per_zone_wmarks - called when min_free_kbytes changes
-- 
2.25.0