Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs changes from Al Viro.
 "A lot of misc stuff.  The obvious groups:
   * Miklos' atomic_open series; kills the damn abuse of
     ->d_revalidate() by NFS, which was the major stumbling block for
     all work in that area.
   * ripping security_file_mmap() and dealing with deadlocks in the
     area; sanitizing the neighborhood of vm_mmap()/vm_munmap() in
     general.
   * ->encode_fh() switched to saner API; insane fake dentry in
     mm/cleancache.c gone.
   * assorted annotations in fs (endianness, __user)
   * parts of Artem's ->s_dirty work (jff2 and reiserfs parts)
   * ->update_time() work from Josef.
   * other bits and pieces all over the place.

  Normally it would've been in two or three pull requests, but
  signal.git stuff had eaten a lot of time during this cycle ;-/"

Fix up trivial conflicts in Documentation/filesystems/vfs.txt (the
'truncate_range' inode method was removed by the VM changes, the VFS
update adds an 'update_time()' method), and in fs/btrfs/ulist.[ch] (due
to sparse fix added twice, with other changes nearby).

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (95 commits)
  nfs: don't open in ->d_revalidate
  vfs: retry last component if opening stale dentry
  vfs: nameidata_to_filp(): don't throw away file on error
  vfs: nameidata_to_filp(): inline __dentry_open()
  vfs: do_dentry_open(): don't put filp
  vfs: split __dentry_open()
  vfs: do_last() common post lookup
  vfs: do_last(): add audit_inode before open
  vfs: do_last(): only return EISDIR for O_CREAT
  vfs: do_last(): check LOOKUP_DIRECTORY
  vfs: do_last(): make ENOENT exit RCU safe
  vfs: make follow_link check RCU safe
  vfs: do_last(): use inode variable
  vfs: do_last(): inline walk_component()
  vfs: do_last(): make exit RCU safe
  vfs: split do_lookup()
  Btrfs: move over to use ->update_time
  fs: introduce inode operation ->update_time
  reiserfs: get rid of resierfs_sync_super
  reiserfs: mark the superblock as dirty a bit later
  ...

Documentation/filesystems/Locking

@@ -61,6 +61,7 @@ ata *);
 	ssize_t (*listxattr) (struct dentry *, char *, size_t);
 	int (*removexattr) (struct dentry *, const char *);
 	int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
+	void (*update_time)(struct inode *, struct timespec *, int);
 
 locking rules:
 	all may block
@@ -87,6 +88,8 @@ getxattr:	no
 listxattr:	no
 removexattr:	yes
 fiemap:		no
+update_time:	no
+
 	Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
 victim.
 	cross-directory ->rename() has (per-superblock) ->s_vfs_rename_sem.

Documentation/filesystems/vfs.txt

@@ -363,6 +363,7 @@ struct inode_operations {
 	ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
 	ssize_t (*listxattr) (struct dentry *, char *, size_t);
 	int (*removexattr) (struct dentry *, const char *);
+	void (*update_time)(struct inode *, struct timespec *, int);
 };
 
 Again, all methods are called without any locks being held, unless
@@ -471,6 +472,9 @@ otherwise noted.
   removexattr: called by the VFS to remove an extended attribute from
   	a file. This method is called by removexattr(2) system call.
 
+  update_time: called by the VFS to update a specific time or the i_version of
+  	an inode.  If this is not defined the VFS will update the inode itself
+  	and call mark_inode_dirty_sync.
 
 The Address Space Object
 ========================

arch/alpha/include/asm/posix_types.h

@@ -10,9 +10,6 @@
 typedef unsigned int	__kernel_ino_t;
 #define __kernel_ino_t __kernel_ino_t
 
-typedef unsigned int	__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned long	__kernel_sigset_t;	/* at least 32 bits */
 
 #include <asm-generic/posix_types.h>

arch/arm/include/asm/posix_types.h

@@ -22,9 +22,6 @@
 typedef unsigned short		__kernel_mode_t;
 #define __kernel_mode_t __kernel_mode_t
 
-typedef unsigned short		__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned short		__kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
 

arch/avr32/include/asm/posix_types.h

@@ -17,9 +17,6 @@
 typedef unsigned short  __kernel_mode_t;
 #define __kernel_mode_t __kernel_mode_t
 
-typedef unsigned short  __kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned short  __kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
 

arch/blackfin/include/asm/posix_types.h

@@ -10,9 +10,6 @@
 typedef unsigned short __kernel_mode_t;
 #define __kernel_mode_t __kernel_mode_t
 
-typedef unsigned short __kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned int __kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
 

arch/cris/include/asm/posix_types.h

@@ -15,9 +15,6 @@
 typedef unsigned short	__kernel_mode_t;
 #define __kernel_mode_t __kernel_mode_t
 
-typedef unsigned short	__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned short  __kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
 

arch/frv/include/asm/posix_types.h

@@ -10,9 +10,6 @@
 typedef unsigned short	__kernel_mode_t;
 #define __kernel_mode_t __kernel_mode_t
 
-typedef unsigned short	__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned short	__kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
 

arch/h8300/include/asm/posix_types.h

@@ -10,9 +10,6 @@
 typedef unsigned short	__kernel_mode_t;
 #define __kernel_mode_t __kernel_mode_t
 
-typedef unsigned short	__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned short	__kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
 

arch/ia64/include/asm/posix_types.h

@@ -1,9 +1,6 @@
 #ifndef _ASM_IA64_POSIX_TYPES_H
 #define _ASM_IA64_POSIX_TYPES_H
 
-typedef unsigned int	__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned long	__kernel_sigset_t;	/* at least 32 bits */
 
 #include <asm-generic/posix_types.h>

arch/ia64/kernel/perfmon.c

@@ -604,12 +604,6 @@ pfm_unprotect_ctx_ctxsw(pfm_context_t *x, unsigned long f)
 	spin_unlock(&(x)->ctx_lock);
 }
 
-static inline unsigned long 
-pfm_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags, unsigned long exec)
-{
-	return get_unmapped_area(file, addr, len, pgoff, flags);
-}
-
 /* forward declaration */
 static const struct dentry_operations pfmfs_dentry_operations;
 
@@ -2333,8 +2327,8 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct file *filp, pfm_context_t
 	down_write(&task->mm->mmap_sem);
 
 	/* find some free area in address space, must have mmap sem held */
-	vma->vm_start = pfm_get_unmapped_area(NULL, 0, size, 0, MAP_PRIVATE|MAP_ANONYMOUS, 0);
-	if (vma->vm_start == 0UL) {
+	vma->vm_start = get_unmapped_area(NULL, 0, size, 0, MAP_PRIVATE|MAP_ANONYMOUS);
+	if (IS_ERR_VALUE(vma->vm_start)) {
 		DPRINT(("Cannot find unmapped area for size %ld\n", size));
 		up_write(&task->mm->mmap_sem);
 		goto error;

arch/ia64/kernel/sys_ia64.c

@@ -171,22 +171,9 @@ asmlinkage unsigned long
 ia64_mremap (unsigned long addr, unsigned long old_len, unsigned long new_len, unsigned long flags,
 	     unsigned long new_addr)
 {
-	extern unsigned long do_mremap (unsigned long addr,
-					unsigned long old_len,
-					unsigned long new_len,
-					unsigned long flags,
-					unsigned long new_addr);
-
-	down_write(&current->mm->mmap_sem);
-	{
-		addr = do_mremap(addr, old_len, new_len, flags, new_addr);
-	}
-	up_write(&current->mm->mmap_sem);
-
-	if (IS_ERR((void *) addr))
-		return addr;
-
-	force_successful_syscall_return();
+	addr = sys_mremap(addr, old_len, new_len, flags, new_addr);
+	if (!IS_ERR((void *) addr))
+		force_successful_syscall_return();
 	return addr;
 }
 

arch/m32r/include/asm/posix_types.h

@@ -10,9 +10,6 @@
 typedef unsigned short	__kernel_mode_t;
 #define __kernel_mode_t __kernel_mode_t
 
-typedef unsigned short	__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned short	__kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
 

arch/m68k/include/asm/posix_types.h

@@ -10,9 +10,6 @@
 typedef unsigned short	__kernel_mode_t;
 #define __kernel_mode_t __kernel_mode_t
 
-typedef unsigned short	__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned short	__kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
 

arch/mips/include/asm/posix_types.h

@@ -17,11 +17,6 @@
  * assume GCC is being used.
  */
 
-#if (_MIPS_SZLONG == 64)
-typedef unsigned int	__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-#endif
-
 typedef long		__kernel_daddr_t;
 #define __kernel_daddr_t __kernel_daddr_t
 

arch/mips/include/asm/stat.h

@@ -20,7 +20,7 @@ struct stat {
 	long		st_pad1[3];		/* Reserved for network id */
 	ino_t		st_ino;
 	mode_t		st_mode;
-	nlink_t		st_nlink;
+	__u32		st_nlink;
 	uid_t		st_uid;
 	gid_t		st_gid;
 	unsigned 	st_rdev;
@@ -55,7 +55,7 @@ struct stat64 {
 	unsigned long long	st_ino;
 
 	mode_t		st_mode;
-	nlink_t		st_nlink;
+	__u32		st_nlink;
 
 	uid_t		st_uid;
 	gid_t		st_gid;
@@ -96,7 +96,7 @@ struct stat {
 	unsigned long		st_ino;
 
 	mode_t			st_mode;
-	nlink_t			st_nlink;
+	__u32			st_nlink;
 
 	uid_t			st_uid;
 	gid_t			st_gid;

arch/mn10300/include/asm/posix_types.h

@@ -20,9 +20,6 @@
 typedef unsigned short	__kernel_mode_t;
 #define __kernel_mode_t __kernel_mode_t
 
-typedef unsigned short	__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned short	__kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
 

arch/parisc/include/asm/posix_types.h

@@ -10,9 +10,6 @@
 typedef unsigned short		__kernel_mode_t;
 #define __kernel_mode_t __kernel_mode_t
 
-typedef unsigned short		__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef unsigned short		__kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
 

arch/parisc/include/asm/stat.h

@@ -7,7 +7,7 @@ struct stat {
 	unsigned int	st_dev;		/* dev_t is 32 bits on parisc */
 	ino_t		st_ino;		/* 32 bits */
 	mode_t		st_mode;	/* 16 bits */
-	nlink_t		st_nlink;	/* 16 bits */
+	unsigned short	st_nlink;	/* 16 bits */
 	unsigned short	st_reserved1;	/* old st_uid */
 	unsigned short	st_reserved2;	/* old st_gid */
 	unsigned int	st_rdev;
@@ -42,7 +42,7 @@ struct hpux_stat64 {
 	unsigned int	st_dev;		/* dev_t is 32 bits on parisc */
 	ino_t           st_ino;         /* 32 bits */
 	mode_t		st_mode;	/* 16 bits */
-	nlink_t		st_nlink;	/* 16 bits */
+	unsigned short	st_nlink;	/* 16 bits */
 	unsigned short	st_reserved1;	/* old st_uid */
 	unsigned short	st_reserved2;	/* old st_gid */
 	unsigned int	st_rdev;

arch/powerpc/include/asm/posix_types.h

@@ -16,9 +16,6 @@ typedef int		__kernel_ssize_t;
 typedef long		__kernel_ptrdiff_t;
 #define __kernel_size_t __kernel_size_t
 
-typedef unsigned short	__kernel_nlink_t;
-#define __kernel_nlink_t __kernel_nlink_t
-
 typedef short		__kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
 #endif