evm: building without EVM enabled fixes

- Missing 'inline' on evm_inode_setattr() definition.
Introduced by commit 817b54aa45db ("evm: add evm_inode_setattr to prevent
updating an invalid security.evm").

- Missing security_old_inode_init_security() stub function definition.
Caused by commit 9d8f13ba3f48 ("security: new security_inode_init_security
API adds function callback").

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
evm: fix build problems

- Make the previously missing security_old_inode_init_security() stub
  function definition static inline.

- The stub security_inode_init_security() function previously returned
  -EOPNOTSUPP and relied on the callers to change it to 0.  The stub
  security/security_old_inode_init_security() functions now return 0.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
security: Fix a typo

Fix a typo.

Signed-off-by: Roy.Li <rongqing.li@windriver.com>
Signed-off-by: James Morris <jmorris@namei.org>
security: sparse fix: Move security_fixup_op to security.h

Fix sparse warning by moving declaraion to global header.

Signed-off-by: James Morris <jmorris@namei.org>
security.h: fix misc typos/grammar errors in comments

Fix various typos/grammar errors in include/linux/security.h comments (no code changes).

Signed-off-by: Vsevolod Alekseev <vsevolod.alekseev@gmx.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
include/linux/security.h: fix security_inode_init_security() arg

Make the security_inode_init_security() initxattrs arg const, to match the
non-stubbed version of that function.

Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Morris <jmorris@namei.org>
security: update security_file_mmap() docs

This documents the fields added to security_file_mmap() that were
introduced in ed0321895182ffb6ecf210e066d87911b270d587.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <jmorris@namei.org>
security: Fix security_old_inode_init_security() when CONFIG_SECURITY is not set

Commit 1e39f384bb01 ("evm: fix build problems") makes the stub version
of security_old_inode_init_security() return 0 when CONFIG_SECURITY is
not set.

But that makes callers such as reiserfs_security_init() assume that
security_old_inode_init_security() has set name, value, and len
arguments properly - but security_old_inode_init_security() left them
uninitialized which then results in interesting failures.

Revert security_old_inode_init_security() to the old behavior of
returning EOPNOTSUPP since both callers (reiserfs and ocfs2) handle this
just fine.

[ Also fixed the S_PRIVATE(inode) case of the actual non-stub
  security_old_inode_init_security() function to return EOPNOTSUPP
  for the same reason, as pointed out by Mimi Zohar.

  It got incorrectly changed to match the new function in commit
  fb88c2b6cbb1: "evm: fix security/security_old_init_security return
  code".   - Linus ]

Reported-by: Jorge Bastos <mysql.jorge@decimal.pt>
Acked-by: James Morris <jmorris@namei.org>
Acked-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
sysfs: count subdirectories

This patch introduces a subdirectory counter for each sysfs directory.

Without the patch, sysfs_refresh_inode would walk all entries of the directory
to calculate the number of subdirectories.

This patch improves time of "ls -la /sys/block" when there are 10000 block
devices from 9 seconds to 0.19 seconds.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>