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authorIngo Molnar <mingo@kernel.org>2020-04-13 09:44:39 +0200
committerIngo Molnar <mingo@kernel.org>2020-04-13 09:44:39 +0200
commit3b02a051d25d9600e9d403ad3043aed7de00160e (patch)
tree5b8f58b79328c04654bf5ab6286401057edeca8f /include/linux/page_ref.h
parentf5d2313bd3c540be405c4977a63840cd6d0167b5 (diff)
parent8f3d9f354286745c751374f5f1fcafee6b3f3136 (diff)
downloadlwn-3b02a051d25d9600e9d403ad3043aed7de00160e.tar.gz
lwn-3b02a051d25d9600e9d403ad3043aed7de00160e.zip
Merge tag 'v5.7-rc1' into locking/kcsan, to resolve conflicts and refresh
Resolve these conflicts: arch/x86/Kconfig arch/x86/kernel/Makefile Do a minor "evil merge" to move the KCSAN entry up a bit by a few lines in the Kconfig to reduce the probability of future conflicts. Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/page_ref.h')
-rw-r--r--include/linux/page_ref.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/page_ref.h b/include/linux/page_ref.h
index 14d14beb1f7f..d27701199a4d 100644
--- a/include/linux/page_ref.h
+++ b/include/linux/page_ref.h
@@ -102,6 +102,15 @@ static inline void page_ref_sub(struct page *page, int nr)
__page_ref_mod(page, -nr);
}
+static inline int page_ref_sub_return(struct page *page, int nr)
+{
+ int ret = atomic_sub_return(nr, &page->_refcount);
+
+ if (page_ref_tracepoint_active(__tracepoint_page_ref_mod_and_return))
+ __page_ref_mod_and_return(page, -nr, ret);
+ return ret;
+}
+
static inline void page_ref_inc(struct page *page)
{
atomic_inc(&page->_refcount);