diff options
| author | Olaf Faaland <[email protected]> | 2017-02-28 16:10:18 -0800 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2017-02-28 16:10:18 -0800 |
| commit | 4859fe796c5b03687a7b2ab3735b882c4f5cad66 (patch) | |
| tree | 197549665cc7fe999404a268da9fc6d44501b308 /include | |
| parent | 912e2ba92f45b61df476e7e15da33e0ea3eb0ae5 (diff) | |
Linux 4.11 compat: avoid refcount_t name conflict
Linux 4.11 introduces a new type, refcount_t, which conflicts with the
type of the same name defined within ZFS.
Rename the ZFS type zfs_refcount_t. Within the ZFS code, use a macro to
cause references to refcount_t to be changed to zfs_refcount_t at
compile time. This reduces conflicts when later landing OpenZFS
patches.
Reviewed-by: George Melikov <[email protected]>
Reviewed-by: Giuseppe Di Natale <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Olaf Faaland <[email protected]>
Closes #5823
Closes #5842
Diffstat (limited to 'include')
| -rw-r--r-- | include/sys/refcount.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/include/sys/refcount.h b/include/sys/refcount.h index 3f50cddb6..a96220b29 100644 --- a/include/sys/refcount.h +++ b/include/sys/refcount.h @@ -41,6 +41,17 @@ extern "C" { */ #define FTAG ((char *)__func__) +/* + * Starting with 4.11, torvalds/linux@f405df5, the linux kernel defines a + * refcount_t type of its own. The macro below effectively changes references + * in the ZFS code from refcount_t to zfs_refcount_t at compile time, so that + * existing code need not be altered, reducing conflicts when landing openZFS + * patches. + */ + +#define refcount_t zfs_refcount_t +#define refcount_add zfs_refcount_add + #ifdef ZFS_DEBUG typedef struct reference { list_node_t ref_link; @@ -56,7 +67,7 @@ typedef struct refcount { list_t rc_removed; uint64_t rc_count; uint64_t rc_removed_count; -} refcount_t; +} zfs_refcount_t; /* Note: refcount_t must be initialized with refcount_create[_untracked]() */ @@ -67,7 +78,7 @@ void refcount_destroy(refcount_t *rc); void refcount_destroy_many(refcount_t *rc, uint64_t number); int refcount_is_zero(refcount_t *rc); int64_t refcount_count(refcount_t *rc); -int64_t refcount_add(refcount_t *rc, void *holder_tag); +int64_t zfs_refcount_add(refcount_t *rc, void *holder_tag); int64_t refcount_remove(refcount_t *rc, void *holder_tag); int64_t refcount_add_many(refcount_t *rc, uint64_t number, void *holder_tag); int64_t refcount_remove_many(refcount_t *rc, uint64_t number, void *holder_tag); @@ -92,7 +103,7 @@ typedef struct refcount { #define refcount_destroy_many(rc, number) ((rc)->rc_count = 0) #define refcount_is_zero(rc) ((rc)->rc_count == 0) #define refcount_count(rc) ((rc)->rc_count) -#define refcount_add(rc, holder) atomic_inc_64_nv(&(rc)->rc_count) +#define zfs_refcount_add(rc, holder) atomic_inc_64_nv(&(rc)->rc_count) #define refcount_remove(rc, holder) atomic_dec_64_nv(&(rc)->rc_count) #define refcount_add_many(rc, number, holder) \ atomic_add_64_nv(&(rc)->rc_count, number) |