projects / people / pmueller / ipfire-2.x.git / blame
| Commit | Line | Data |
|---|---|---|
| 79f94395 MT |
1 | --- compat-drivers-3.8-1-u/include/linux/compat-3.8.h.orig 2013-05-16 20:35:27.046386772 +0200 |
| 2 | +++ compat-drivers-3.8-1-u/include/linux/compat-3.8.h 2013-05-16 20:35:39.219767618 +0200 | |
| 3 | @@ -24,35 +24,6 @@ | |
| 4 | ||
| 5 | /* This backports: | |
| 6 | * | |
| 7 | - * commit 4b20db3de8dab005b07c74161cb041db8c5ff3a7 | |
| 8 | - * Author: Thomas Hellstrom <thellstrom@vmware.com> | |
| 9 | - * Date: Tue Nov 6 11:31:49 2012 +0000 | |
| 10 | - * | |
| 11 | - * kref: Implement kref_get_unless_zero v3 | |
| 12 | - */ | |
| 13 | -/** | |
| 14 | - * kref_get_unless_zero - Increment refcount for object unless it is zero. | |
| 15 | - * @kref: object. | |
| 16 | - * | |
| 17 | - * Return non-zero if the increment succeeded. Otherwise return 0. | |
| 18 | - * | |
| 19 | - * This function is intended to simplify locking around refcounting for | |
| 20 | - * objects that can be looked up from a lookup structure, and which are | |
| 21 | - * removed from that lookup structure in the object destructor. | |
| 22 | - * Operations on such objects require at least a read lock around | |
| 23 | - * lookup + kref_get, and a write lock around kref_put + remove from lookup | |
| 24 | - * structure. Furthermore, RCU implementations become extremely tricky. | |
| 25 | - * With a lookup followed by a kref_get_unless_zero *with return value check* | |
| 26 | - * locking in the kref_put path can be deferred to the actual removal from | |
| 27 | - * the lookup structure and RCU lookups become trivial. | |
| 28 | - */ | |
| 29 | -static inline int __must_check kref_get_unless_zero(struct kref *kref) | |
| 30 | -{ | |
| 31 | - return atomic_add_unless(&kref->refcount, 1, 0); | |
| 32 | -} | |
| 33 | - | |
| 34 | -/* This backports: | |
| 35 | - * | |
| 36 | * commit 83e68189745ad931c2afd45d8ee3303929233e7f | |
| 37 | * Author: Matt Fleming <matt.fleming@intel.com> | |
| 38 | * Date: Wed Nov 14 09:42:35 2012 +0000 |