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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-11 17:34:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-11 17:34:10 -0700 |
| commit | a379f71a30dddbd2e7393624e455ce53c87965d1 (patch) | |
| tree | c9c71b3eb19ff7e8618ff29e9d5ac99882b823e1 /include/linux/radix-tree.h | |
| parent | de34f4da7f62ff59ac6e1ef320b0fcfa3296fce3 (diff) | |
| parent | 9c5d760b8d229b94c5030863a5edaee5f1a9d7b7 (diff) | |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:
- a few block updates that fell in my lap
- lib/ updates
- checkpatch
- autofs
- ipc
- a ton of misc other things
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (100 commits)
mm: split gfp_mask and mapping flags into separate fields
fs: use mapping_set_error instead of opencoded set_bit
treewide: remove redundant #include <linux/kconfig.h>
hung_task: allow hung_task_panic when hung_task_warnings is 0
kthread: add kerneldoc for kthread_create()
kthread: better support freezable kthread workers
kthread: allow to modify delayed kthread work
kthread: allow to cancel kthread work
kthread: initial support for delayed kthread work
kthread: detect when a kthread work is used by more workers
kthread: add kthread_destroy_worker()
kthread: add kthread_create_worker*()
kthread: allow to call __kthread_create_on_node() with va_list args
kthread/smpboot: do not park in kthread_create_on_cpu()
kthread: kthread worker API cleanup
kthread: rename probe_kthread_data() to kthread_probe_data()
scripts/tags.sh: enable code completion in VIM
mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping
kdump, vmcoreinfo: report memory sections virtual addresses
ipc/sem.c: add cond_resched in exit_sme
...
Diffstat (limited to 'include/linux/radix-tree.h')
| -rw-r--r-- | include/linux/radix-tree.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h index 52b97db93830..af3581b8a451 100644 --- a/include/linux/radix-tree.h +++ b/include/linux/radix-tree.h @@ -461,6 +461,14 @@ static inline struct radix_tree_node *entry_to_node(void *ptr) * * This function updates @iter->index in the case of a successful lookup. * For tagged lookup it also eats @iter->tags. + * + * There are several cases where 'slot' can be passed in as NULL to this + * function. These cases result from the use of radix_tree_iter_next() or + * radix_tree_iter_retry(). In these cases we don't end up dereferencing + * 'slot' because either: + * a) we are doing tagged iteration and iter->tags has been set to 0, or + * b) we are doing non-tagged iteration, and iter->index and iter->next_index + * have been set up so that radix_tree_chunk_size() returns 1 or 0. */ static __always_inline void ** radix_tree_next_slot(void **slot, struct radix_tree_iter *iter, unsigned flags) |