mars/pre-patches/vanilla-3.16/0001-mars-minimum-pre-patch-for-mars.patch

From db0dd0a027dd423781b5dd3b2f21fab029f05b78 Mon Sep 17 00:00:00 2001
From: Thomas Schoebel-Theuer <tst@1und1.de>
Date: Thu, 30 Jan 2020 12:43:08 +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 f15e87e8a1dd..6f852abb76d2 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -162,6 +162,7 @@ struct kioctx {
 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;
@@ -1318,6 +1319,7 @@ 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 
@@ -1354,6 +1356,7 @@ SYSCALL_DEFINE1(io_destroy, aio_context_t, ctx)
 	pr_debug("EINVAL: io_destroy: invalid context id\n");
 	return -EINVAL;
 }
+EXPORT_SYMBOL(sys_io_destroy);
 
 typedef ssize_t (aio_rw_op)(struct kiocb *, const struct iovec *,
 			    unsigned long, loff_t);
@@ -1645,6 +1648,7 @@ 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
@@ -1735,6 +1739,7 @@ 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
@@ -1764,3 +1769,4 @@ 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 2ec89079ddbd..2eb0659d6cfa 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3544,6 +3544,7 @@ SYSCALL_DEFINE2(mkdir, const char __user *, pathname, umode_t, mode)
 {
 	return sys_mkdirat(AT_FDCWD, pathname, mode);
 }
+EXPORT_SYMBOL(sys_mkdir);
 
 /*
  * The dentry_unhash() helper will try to drop the dentry early: we
@@ -3669,6 +3670,7 @@ SYSCALL_DEFINE1(rmdir, const char __user *, pathname)
 {
 	return do_rmdir(AT_FDCWD, pathname);
 }
+EXPORT_SYMBOL(sys_rmdir);
 
 /**
  * vfs_unlink - unlink a filesystem object
@@ -3818,6 +3820,7 @@ 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)
 {
@@ -3875,6 +3878,7 @@ 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
@@ -4359,6 +4363,7 @@ 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 readlink_copy(char __user *buffer, int buflen, const char *link)
 {
diff --git a/fs/open.c b/fs/open.c
index c4949a39726a..0a21eed33aac 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -545,6 +545,7 @@ 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(struct path *path, uid_t user, gid_t group)
 {
@@ -630,6 +631,7 @@ 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 61abc3051377..ccaf6d557383 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>
@@ -181,6 +182,7 @@ retry:
 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 d9c92daa3944..0706fad42946 100644
--- a/include/linux/aio.h
+++ b/include/linux/aio.h
@@ -70,6 +70,7 @@ static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp)
 
 /* prototypes */
 #ifdef CONFIG_AIO
+#define HAS_AIO_MAX
 extern ssize_t wait_on_sync_kiocb(struct kiocb *iocb);
 extern void aio_complete(struct kiocb *iocb, long res, long res2);
 struct mm_struct;
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 b491f75f7491..fc1de14eca43 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -207,6 +207,7 @@ static char * const zone_names[MAX_NR_ZONES] = {
 };
 
 int min_free_kbytes = 1024;
+EXPORT_SYMBOL(min_free_kbytes);
 int user_min_free_kbytes = -1;
 
 static unsigned long __meminitdata nr_kernel_pages;
@@ -5773,6 +5774,7 @@ 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