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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-07 19:56:33 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-07 19:56:33 +0300 |
| commit | b4a45f5fe8078bfc10837dbd5b98735058bc4698 (patch) | |
| tree | df6f13a27610a3ec7eb4a661448cd779a8f84c79 /include/linux/posix_acl.h | |
| parent | 01539ba2a706ab7d35fc0667dff919ade7f87d63 (diff) | |
| parent | b3e19d924b6eaf2ca7d22cba99a517c5171007b6 (diff) | |
| download | linux-b4a45f5fe8078bfc10837dbd5b98735058bc4698.tar.xz | |
Merge branch 'vfs-scale-working' of git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin
* 'vfs-scale-working' of git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin: (57 commits)
fs: scale mntget/mntput
fs: rename vfsmount counter helpers
fs: implement faster dentry memcmp
fs: prefetch inode data in dcache lookup
fs: improve scalability of pseudo filesystems
fs: dcache per-inode inode alias locking
fs: dcache per-bucket dcache hash locking
bit_spinlock: add required includes
kernel: add bl_list
xfs: provide simple rcu-walk ACL implementation
btrfs: provide simple rcu-walk ACL implementation
ext2,3,4: provide simple rcu-walk ACL implementation
fs: provide simple rcu-walk generic_check_acl implementation
fs: provide rcu-walk aware permission i_ops
fs: rcu-walk aware d_revalidate method
fs: cache optimise dentry and inode for rcu-walk
fs: dcache reduce branches in lookup path
fs: dcache remove d_mounted
fs: fs_struct use seqlock
fs: rcu-walk for path lookup
...
Diffstat (limited to 'include/linux/posix_acl.h')
| -rw-r--r-- | include/linux/posix_acl.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h index 67608161df6b..d68283a898bb 100644 --- a/include/linux/posix_acl.h +++ b/include/linux/posix_acl.h @@ -108,6 +108,25 @@ static inline struct posix_acl *get_cached_acl(struct inode *inode, int type) return acl; } +static inline int negative_cached_acl(struct inode *inode, int type) +{ + struct posix_acl **p, *acl; + switch (type) { + case ACL_TYPE_ACCESS: + p = &inode->i_acl; + break; + case ACL_TYPE_DEFAULT: + p = &inode->i_default_acl; + break; + default: + BUG(); + } + acl = ACCESS_ONCE(*p); + if (acl) + return 0; + return 1; +} + static inline void set_cached_acl(struct inode *inode, int type, struct posix_acl *acl) |