Add page flag PG_atomic, meaning that a folio needs to be written back
atomically.
Signed-off-by: John Garry <[email protected]>
---
include/linux/page-flags.h | 5 +++++
include/trace/events/mmflags.h | 3 ++-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 652d77805e99..e777b2e7daaf 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -119,6 +119,7 @@ enum pageflags {
PG_reclaim, /* To be reclaimed asap */
PG_swapbacked, /* Page is backed by RAM/swap */
PG_unevictable, /* Page is "unevictable" */
+ PG_atomic,
#ifdef CONFIG_MMU
PG_mlocked, /* Page is vma mlocked */
#endif
@@ -579,6 +580,10 @@ PAGEFLAG(Unevictable, unevictable, PF_HEAD)
__CLEARPAGEFLAG(Unevictable, unevictable, PF_HEAD)
TESTCLEARFLAG(Unevictable, unevictable, PF_HEAD)
+PAGEFLAG(Atomic, atomic, PF_HEAD)
+ __CLEARPAGEFLAG(Atomic, atomic, PF_HEAD)
+ TESTCLEARFLAG(Atomic, atomic, PF_HEAD)
+
#ifdef CONFIG_MMU
PAGEFLAG(Mlocked, mlocked, PF_NO_TAIL)
__CLEARPAGEFLAG(Mlocked, mlocked, PF_NO_TAIL)
diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h
index d801409b33cf..3c83e7b93898 100644
--- a/include/trace/events/mmflags.h
+++ b/include/trace/events/mmflags.h
@@ -118,7 +118,8 @@
DEF_PAGEFLAG_NAME(mappedtodisk), \
DEF_PAGEFLAG_NAME(reclaim), \
DEF_PAGEFLAG_NAME(swapbacked), \
- DEF_PAGEFLAG_NAME(unevictable) \
+ DEF_PAGEFLAG_NAME(unevictable), \
+ DEF_PAGEFLAG_NAME(atomic) \
IF_HAVE_PG_MLOCK(mlocked) \
IF_HAVE_PG_UNCACHED(uncached) \
IF_HAVE_PG_HWPOISON(hwpoison) \
--
2.31.1