Hi Jeff,

FYI, there are new compile warnings show up in

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-next
head:   713fdd18bf2d10c67c728a6342decf04a507d168
commit: f29cd968a6b48b7d6d7749c9846f3cefc06321e6 [14/22] vfs: define struct filename and have getname() return it
config: alpha-defconfig # make ARCH=alpha defconfig

All warnings:

arch/alpha/kernel/osf_sys.c: In function 'osf_ufs_mount':
arch/alpha/kernel/osf_sys.c:461:2: warning: passing argument 1 of 'do_mount' discards 'const' qualifier from pointer target type [enabled by default]
In file included from include/linux/trace_seq.h:4:0,
                 from include/linux/ftrace_event.h:5,
                 from include/trace/syscall.h:6,
                 from include/linux/syscalls.h:78,
                 from arch/alpha/kernel/osf_sys.c:19:
include/linux/fs.h:2078:13: note: expected 'char *' but argument is of type 'const char *'
arch/alpha/kernel/osf_sys.c: In function 'osf_cdfs_mount':
arch/alpha/kernel/osf_sys.c:481:2: warning: passing argument 1 of 'do_mount' discards 'const' qualifier from pointer target type [enabled by default]
In file included from include/linux/trace_seq.h:4:0,
                 from include/linux/ftrace_event.h:5,
                 from include/trace/syscall.h:6,
                 from include/linux/syscalls.h:78,
                 from arch/alpha/kernel/osf_sys.c:19:
include/linux/fs.h:2078:13: note: expected 'char *' but argument is of type 'const char *'
arch/alpha/kernel/osf_sys.c: In function 'SYSC_osf_mount':
arch/alpha/kernel/osf_sys.c:510:3: warning: passing argument 1 of 'osf_ufs_mount' discards 'const' qualifier from pointer target type [enabled by default]
arch/alpha/kernel/osf_sys.c:448:1: note: expected 'char *' but argument is of type 'const char *'
arch/alpha/kernel/osf_sys.c:513:3: warning: passing argument 1 of 'osf_cdfs_mount' discards 'const' qualifier from pointer target type [enabled by default]
arch/alpha/kernel/osf_sys.c:468:1: note: expected 'char *' but argument is of type 'const char *'
arch/alpha/kernel/osf_sys.c:516:3: warning: passing argument 1 of 'osf_procfs_mount' discards 'const' qualifier from pointer target type [enabled by default]
arch/alpha/kernel/osf_sys.c:488:1: note: expected 'char *' but argument is of type 'const char *'

vim +461 arch/alpha/kernel/osf_sys.c

^1da177e Linus Torvalds 2005-04-16  445   * unhappy with OSF UFS. [CHECKME]
^1da177e Linus Torvalds 2005-04-16  446   */
^1da177e Linus Torvalds 2005-04-16  447  static int
^1da177e Linus Torvalds 2005-04-16  448  osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
^1da177e Linus Torvalds 2005-04-16  449  {
^1da177e Linus Torvalds 2005-04-16  450  	int retval;
^1da177e Linus Torvalds 2005-04-16  451  	struct cdfs_args tmp;
f29cd968 Jeff Layton    2012-10-10  452  	struct filename *devname;
^1da177e Linus Torvalds 2005-04-16  453  
^1da177e Linus Torvalds 2005-04-16  454  	retval = -EFAULT;
^1da177e Linus Torvalds 2005-04-16  455  	if (copy_from_user(&tmp, args, sizeof(tmp)))
^1da177e Linus Torvalds 2005-04-16  456  		goto out;
^1da177e Linus Torvalds 2005-04-16  457  	devname = getname(tmp.devname);
^1da177e Linus Torvalds 2005-04-16  458  	retval = PTR_ERR(devname);
^1da177e Linus Torvalds 2005-04-16  459  	if (IS_ERR(devname))
^1da177e Linus Torvalds 2005-04-16  460  		goto out;
f29cd968 Jeff Layton    2012-10-10 @461  	retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
^1da177e Linus Torvalds 2005-04-16  462  	putname(devname);
^1da177e Linus Torvalds 2005-04-16  463   out:
^1da177e Linus Torvalds 2005-04-16  464  	return retval;
^1da177e Linus Torvalds 2005-04-16  465  }
^1da177e Linus Torvalds 2005-04-16  466  
^1da177e Linus Torvalds 2005-04-16  467  static int
^1da177e Linus Torvalds 2005-04-16  468  osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
^1da177e Linus Torvalds 2005-04-16  469  {

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Fengguang Wu, Yuanhan Liu                              Intel Corporation