The patch titled
Subject: include/linux/sched/mm.h: re-inline mmdrop()
has been added to the -mm tree. Its filename is
include-linux-sched-mmh-re-inline-mmdrop.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/include-linux-sched-mmh-re-inline-mmdrop.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/include-linux-sched-mmh-re-inline-mmdrop.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: include/linux/sched/mm.h: re-inline mmdrop()
As Peter points out, Doing a CALL+RET for just the decrement is a bit silly.
Fixes: d70f2a14b72a4bc ("include/linux/sched/mm.h: uninline mmdrop_async(), etc")
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/sched/mm.h | 8 +++++++-
kernel/fork.c | 10 ++--------
2 files changed, 9 insertions(+), 9 deletions(-)
diff -puN include/linux/sched/mm.h~include-linux-sched-mmh-re-inline-mmdrop include/linux/sched/mm.h
--- a/include/linux/sched/mm.h~include-linux-sched-mmh-re-inline-mmdrop
+++ a/include/linux/sched/mm.h
@@ -35,7 +35,13 @@ static inline void mmgrab(struct mm_stru
atomic_inc(&mm->mm_count);
}
-extern void mmdrop(struct mm_struct *mm);
+extern void __mmdrop(struct mm_struct *mm);
+
+static inline void mmdrop(struct mm_struct *mm)
+{
+ if (unlikely(atomic_dec_and_test(&mm->mm_count)))
+ __mmdrop(mm);
+}
/**
* mmget() - Pin the address space associated with a &struct mm_struct.
diff -puN kernel/fork.c~include-linux-sched-mmh-re-inline-mmdrop kernel/fork.c
--- a/kernel/fork.c~include-linux-sched-mmh-re-inline-mmdrop
+++ a/kernel/fork.c
@@ -591,7 +591,7 @@ static void check_mm(struct mm_struct *m
* is dropped: either by a lazy thread or by
* mmput. Free the page directory and the mm.
*/
-static void __mmdrop(struct mm_struct *mm)
+void __mmdrop(struct mm_struct *mm)
{
BUG_ON(mm == &init_mm);
mm_free_pgd(mm);
@@ -602,13 +602,7 @@ static void __mmdrop(struct mm_struct *m
put_user_ns(mm->user_ns);
free_mm(mm);
}
-
-void mmdrop(struct mm_struct *mm)
-{
- if (unlikely(atomic_dec_and_test(&mm->mm_count)))
- __mmdrop(mm);
-}
-EXPORT_SYMBOL_GPL(mmdrop);
+EXPORT_SYMBOL_GPL(__mmdrop);
static void mmdrop_async_fn(struct work_struct *work)
{
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
i-need-old-gcc.patch
include-linux-sched-mmh-re-inline-mmdrop.patch
arm-arch-arm-include-asm-pageh-needs-personalityh.patch
mm.patch
list_lru-prefetch-neighboring-list-entries-before-acquiring-lock-fix.patch
mm-oom-cgroup-aware-oom-killer-fix.patch
mm-oom-docs-describe-the-cgroup-aware-oom-killer-fix-2-fix.patch
fs-elf-drop-map_fixed-usage-from-elf_map-checkpatch-fixes.patch
mm-migrate-remove-reason-argument-from-new_page_t-fix-fix.patch
kasan-clean-up-kasan_shadow_scale_shift-usage-checkpatch-fixes.patch
lib-ubsanc-s-missaligned-misaligned.patch
linux-next-rejects.patch
linux-next-git-rejects.patch
fs-crypto-hooksc-fix-build-with-gcc-444.patch
maintainers-update-arm-oxnas-platform-support-patterns-fix.patch
kernel-forkc-export-kernel_thread-to-modules.patch
slab-leaks3-default-y.patch
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