Subject: + list-introduce-list_last_entry-use-list_firstlast_entry.patch added to -mm tree
To: oleg@xxxxxxxxxx,a.p.zijlstra@xxxxxxxxx,eilong@xxxxxxxxxxxx,gregkh@xxxxxxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 11 Nov 2013 15:18:54 -0800
The patch titled
Subject: list: introduce list_last_entry(), use list_{first,last}_entry()
has been added to the -mm tree. Its filename is
list-introduce-list_last_entry-use-list_firstlast_entry.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/list-introduce-list_last_entry-use-list_firstlast_entry.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/list-introduce-list_last_entry-use-list_firstlast_entry.patch
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------------------------------------------------------
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Subject: list: introduce list_last_entry(), use list_{first,last}_entry()
We already have list_first_entry(), it makes sense to also add
list_last_entry() for consistency. And we use both helpers in
list_for_each_*().
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Eilon Greenstein <eilong@xxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/list.h | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)
diff -puN include/linux/list.h~list-introduce-list_last_entry-use-list_firstlast_entry include/linux/list.h
--- a/include/linux/list.h~list-introduce-list_last_entry-use-list_firstlast_entry
+++ a/include/linux/list.h
@@ -362,6 +362,17 @@ static inline void list_splice_tail_init
list_entry((ptr)->next, type, member)
/**
+ * list_last_entry - get the last 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 list is expected to be not empty.
+ */
+#define list_last_entry(ptr, type, member) \
+ list_entry((ptr)->prev, 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.
@@ -432,7 +443,7 @@ static inline void list_splice_tail_init
* @member: the name of the list_struct within the struct.
*/
#define list_for_each_entry(pos, head, member) \
- for (pos = list_entry((head)->next, typeof(*pos), member); \
+ for (pos = list_first_entry(head, typeof(*pos), member); \
&pos->member != (head); \
pos = list_next_entry(pos, member))
@@ -443,7 +454,7 @@ static inline void list_splice_tail_init
* @member: the name of the list_struct within the struct.
*/
#define list_for_each_entry_reverse(pos, head, member) \
- for (pos = list_entry((head)->prev, typeof(*pos), member); \
+ for (pos = list_last_entry(head, typeof(*pos), member); \
&pos->member != (head); \
pos = list_prev_entry(pos, member))
@@ -506,7 +517,7 @@ static inline void list_splice_tail_init
* @member: the name of the list_struct within the struct.
*/
#define list_for_each_entry_safe(pos, n, head, member) \
- for (pos = list_entry((head)->next, typeof(*pos), member), \
+ for (pos = list_first_entry(head, typeof(*pos), member), \
n = list_next_entry(pos, member); \
&pos->member != (head); \
pos = n, n = list_next_entry(n, member))
@@ -553,7 +564,7 @@ static inline void list_splice_tail_init
* of list entry.
*/
#define list_for_each_entry_safe_reverse(pos, n, head, member) \
- for (pos = list_entry((head)->prev, typeof(*pos), member), \
+ for (pos = list_last_entry(head, typeof(*pos), member), \
n = list_prev_entry(pos, member); \
&pos->member != (head); \
pos = n, n = list_prev_entry(n, member))
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
kthread-make-kthread_create-killable.patch
list-introduce-list_next_entry-and-list_prev_entry.patch
list-change-list_for_each_entry-to-use-list__entry.patch
list-introduce-list_last_entry-use-list_firstlast_entry.patch
debugfs-use-list_next_entry-in-debugfs_remove_recursive.patch
exec-ptrace-fix-get_dumpable-incorrect-tests.patch
linux-next.patch
mm-avoid-increase-sizeofstruct-page-due-to-split-page-table-lock.patch
mm-rename-use_split_ptlocks-to-use_split_pte_ptlocks.patch
mm-convert-mm-nr_ptes-to-atomic_long_t.patch
mm-introduce-api-for-split-page-table-lock-for-pmd-level.patch
mm-thp-change-pmd_trans_huge_lock-to-return-taken-lock.patch
mm-thp-move-ptl-taking-inside-page_check_address_pmd.patch
mm-thp-do-not-access-mm-pmd_huge_pte-directly.patch
mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock.patch
mm-convert-the-rest-to-new-page-table-lock-api.patch
mm-implement-split-page-table-lock-for-pmd-level.patch
x86-mm-enable-split-page-table-lock-for-pmd-level.patch
autofs4-allow-autofs-to-work-outside-the-initial-pid-namespace.patch
autofs4-translate-pids-to-the-right-namespace-for-the-daemon.patch
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