mars/pre-patches/vanilla-4.9/0001-mars-minimum-pre-patch-for-mars.patch

From 922c4d75ec71ea531922a797039a72cbe102592f Mon Sep 17 00:00:00 2001
From: Thomas Schoebel-Theuer <tst@1und1.de>
Date: Thu, 30 Jan 2020 13:31:46 +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 c3fc80294397..856ffda154cc 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;
@@ -1384,6 +1385,7 @@ SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
 out:
 	return ret;
 }
+EXPORT_SYMBOL(sys_io_setup);
 
 /* sys_io_destroy:
  *	Destroy the aio_context specified.  May cancel any outstanding 
@@ -1420,6 +1422,7 @@ 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)
@@ -1662,6 +1665,7 @@ 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
@@ -1751,6 +1755,7 @@ 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
@@ -1780,3 +1785,4 @@ SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id,
 	}
 	return ret;
 }
+EXPORT_SYMBOL(sys_io_getevents);
diff --git a/fs/namei.c b/fs/namei.c
index 7150c4d0bd7b..769ac73b411e 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3866,6 +3866,7 @@ 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)
 {
@@ -3969,6 +3970,7 @@ SYSCALL_DEFINE1(rmdir, const char __user *, pathname)
 {
 	return do_rmdir(AT_FDCWD, pathname);
 }
+EXPORT_SYMBOL(sys_rmdir);
 
 /**
  * vfs_unlink - unlink a filesystem object
@@ -4122,6 +4124,7 @@ 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)
 {
@@ -4179,6 +4182,7 @@ 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
@@ -4670,6 +4674,7 @@ 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 8db6e3a5fc10..b0f3985a8d57 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -599,6 +599,7 @@ 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)
 {
@@ -684,6 +685,7 @@ 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 22307cdf7014..c0164e967eb4 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -1,3 +1,4 @@
+#include <linux/module.h>
 #include <linux/compiler.h>
 #include <linux/file.h>
 #include <linux/fs.h>
@@ -167,6 +168,7 @@ long do_utimes(int dfd, const char __user *filename, struct timespec *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 9eb42dbc5582..1dccb3fbec69 100644
--- a/include/linux/aio.h
+++ b/include/linux/aio.h
@@ -13,6 +13,7 @@ typedef int (kiocb_cancel_fn)(struct kiocb *);
 
 /* prototypes */
 #ifdef CONFIG_AIO
+#define HAS_AIO_MAX
 extern void exit_aio(struct mm_struct *mm);
 extern long do_io_submit(aio_context_t ctx_id, long nr,
 			 struct iocb __user *__user *iocbpp, bool compat);
diff --git a/include/uapi/linux/major.h b/include/uapi/linux/major.h
index 620252e69b44..61a665cdb420 100644
--- a/include/uapi/linux/major.h
+++ b/include/uapi/linux/major.h
@@ -148,6 +148,7 @@
 #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 13a642192e12..021ea6582ea2 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -254,6 +254,7 @@ 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;
 
@@ -6712,6 +6713,7 @@ 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