The patch titled
Subject: mm: cleanup is_highmem()
has been added to the -mm mm-unstable branch. Its filename is
mm-cleanup-is_highmem.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-cleanup-is_highmem.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Subject: mm: cleanup is_highmem()
Date: Tue, 26 Jul 2022 21:18:16 +0800
It is unnecessary to add CONFIG_HIGHMEM check in is_highmem(), which has
been done in is_highmem_idx(), and move is_highmem() close to
is_highmem_idx(). This has no functional impact.
Link: https://lkml.kernel.org/r/20220726131816.149075-1-wangkefeng.wang@xxxxxxxxxx
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mmzone.h | 20 ++++++++------------
1 file changed, 8 insertions(+), 12 deletions(-)
--- a/include/linux/mmzone.h~mm-cleanup-is_highmem
+++ a/include/linux/mmzone.h
@@ -1137,15 +1137,6 @@ static inline int is_highmem_idx(enum zo
#endif
}
-#ifdef CONFIG_ZONE_DMA
-bool has_managed_dma(void);
-#else
-static inline bool has_managed_dma(void)
-{
- return false;
-}
-#endif
-
/**
* is_highmem - helper function to quickly check if a struct zone is a
* highmem zone or not. This is an attempt to keep references
@@ -1155,12 +1146,17 @@ static inline bool has_managed_dma(void)
*/
static inline int is_highmem(struct zone *zone)
{
-#ifdef CONFIG_HIGHMEM
return is_highmem_idx(zone_idx(zone));
+}
+
+#ifdef CONFIG_ZONE_DMA
+bool has_managed_dma(void);
#else
- return 0;
-#endif
+static inline bool has_managed_dma(void)
+{
+ return false;
}
+#endif
/* These two functions are used to setup the per zone pages min values */
struct ctl_table;
_
Patches currently in -mm which might be from wangkefeng.wang@xxxxxxxxxx are
mm-cleanup-is_highmem.patch
