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| author | Takashi Iwai <tiwai@suse.de> | 2013-06-17 10:45:28 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-06-17 10:45:28 +0200 |
| commit | ddf753efa4f1f74cb182be6d0a6e41d72a8bf807 (patch) | |
| tree | a894b94b7e36f338d5879a243d628e346060cb4a /include/linux/list.h | |
| parent | 63e51fd708f511a5989da04c669647993bc1a512 (diff) | |
| parent | 36691e1be6ec551eef4a5225f126a281f8c051c2 (diff) | |
Merge branch 'for-linus' into for-next
* for-linus: (635 commits)
ALSA: usb-audio: Fix invalid volume resolution for Logitech HD Webcam c310
ALSA: hda - Fix pin configurations for MacBook Air 4,2
ALSA: usb-audio: work around Android accessory firmware bug
ALSA: hda - Headset mic support for three more machines
Linux 3.10-rc6
smp.h: Use local_irq_{save,restore}() in !SMP version of on_each_cpu().
powerpc: Fix missing/delayed calls to irq_work
powerpc: Fix emulation of illegal instructions on PowerNV platform
powerpc: Fix stack overflow crash in resume_kernel when ftracing
snd_pcm_link(): fix a leak...
use can_lookup() instead of direct checks of ->i_op->lookup
move exit_task_namespaces() outside of exit_notify()
fput: task_work_add() can fail if the caller has passed exit_task_work()
xfs: don't shutdown log recovery on validation errors
xfs: ensure btree root split sets blkno correctly
xfs: fix implicit padding in directory and attr CRC formats
xfs: don't emit v5 superblock warnings on write
mei: me: clear interrupts on the resume path
mei: nfc: fix nfc device freeing
mei: init: Flush scheduled work before resetting the device
...
Diffstat (limited to 'include/linux/list.h')
| -rw-r--r-- | include/linux/list.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/list.h b/include/linux/list.h index 6a1f8df9144b..b83e5657365a 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -362,6 +362,17 @@ static inline void list_splice_tail_init(struct list_head *list, list_entry((ptr)->next, type, member) /** + * list_first_entry_or_null - get the first element from a list + * @ptr: the list head to take the element from. + * @type: the type of the struct this is embedded in. + * @member: the name of the list_struct within the struct. + * + * Note that if the list is empty, it returns NULL. + */ +#define list_first_entry_or_null(ptr, type, member) \ + (!list_empty(ptr) ? list_first_entry(ptr, type, member) : NULL) + +/** * list_for_each - iterate over a list * @pos: the &struct list_head to use as a loop cursor. * @head: the head for your list. |