diff options
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index bd0a1b2f3c02..6abcd0b72ae0 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -18,6 +18,7 @@ #include <linux/pid.h> #include <linux/bug.h> #include <linux/mutex.h> +#include <linux/rwsem.h> #include <linux/capability.h> #include <linux/semaphore.h> #include <linux/fiemap.h> @@ -401,7 +402,7 @@ struct address_space { atomic_t i_mmap_writable;/* count VM_SHARED mappings */ struct rb_root i_mmap; /* tree of private and shared mappings */ struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */ - struct mutex i_mmap_mutex; /* protect tree, count, list */ + struct rw_semaphore i_mmap_rwsem; /* protect tree, count, list */ /* Protected by tree_lock together with the radix tree */ unsigned long nrpages; /* number of total pages */ unsigned long nrshadows; /* number of shadow entries */ @@ -469,12 +470,12 @@ int mapping_tagged(struct address_space *mapping, int tag); static inline void i_mmap_lock_write(struct address_space *mapping) { - mutex_lock(&mapping->i_mmap_mutex); + down_write(&mapping->i_mmap_rwsem); } static inline void i_mmap_unlock_write(struct address_space *mapping) { - mutex_unlock(&mapping->i_mmap_mutex); + up_write(&mapping->i_mmap_rwsem); } /* |