This is a note to let you know that I've just added the patch titled
arch, mm: remove stale mentions of DISCONIGMEM
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arch-mm-remove-stale-mentions-of-disconigmem.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 74b2661bbbf0bb2c8a96af1637c1d39b02754f0e
Author: Mike Rapoport <rppt@xxxxxxxxxx>
Date: Mon Jun 28 19:42:55 2021 -0700
arch, mm: remove stale mentions of DISCONIGMEM
[ Upstream commit d3c251ab95b69f3dc189c4657baeac1b4c050789 ]
There are several places that mention DISCONIGMEM in comments or have
stale code guarded by CONFIG_DISCONTIGMEM.
Remove the dead code and update the comments.
Link: https://lkml.kernel.org/r/20210608091316.3622-7-rppt@xxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Matt Turner <mattst88@xxxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Vineet Gupta <vgupta@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Stable-dep-of: e1a9ae457369 ("mips: Fix max_mapnr being uninitialized on early stages")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index 09fc385c2acd..3639e0a7cb3b 100644
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -3,9 +3,8 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * This file contains NUMA specific variables and functions which can
- * be split away from DISCONTIGMEM and are used on NUMA machines with
- * contiguous memory.
+ * This file contains NUMA specific variables and functions which are used on
+ * NUMA machines with contiguous memory.
* 2002/08/07 Erich Focht <efocht@xxxxxxxxxx>
* Populate cpu entries in sysfs for non-numa systems as well
* Intel Corporation - Ashok Raj
diff --git a/arch/ia64/mm/numa.c b/arch/ia64/mm/numa.c
index 5e1015eb6d0d..ad6837d00e7d 100644
--- a/arch/ia64/mm/numa.c
+++ b/arch/ia64/mm/numa.c
@@ -3,9 +3,8 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * This file contains NUMA specific variables and functions which can
- * be split away from DISCONTIGMEM and are used on NUMA machines with
- * contiguous memory.
+ * This file contains NUMA specific variables and functions which are used on
+ * NUMA machines with contiguous memory.
*
* 2002/08/07 Erich Focht <efocht@xxxxxxxxxx>
*/
diff --git a/arch/mips/include/asm/mmzone.h b/arch/mips/include/asm/mmzone.h
index b826b8473e95..7649ab45e80c 100644
--- a/arch/mips/include/asm/mmzone.h
+++ b/arch/mips/include/asm/mmzone.h
@@ -20,10 +20,4 @@
#define nid_to_addrbase(nid) 0
#endif
-#ifdef CONFIG_DISCONTIGMEM
-
-#define pfn_to_nid(pfn) pa_to_nid((pfn) << PAGE_SHIFT)
-
-#endif /* CONFIG_DISCONTIGMEM */
-
#endif /* _ASM_MMZONE_H_ */
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index a73899933505..dee6a790d42d 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -453,9 +453,6 @@ void __init mem_init(void)
BUILD_BUG_ON(IS_ENABLED(CONFIG_32BIT) && (_PFN_SHIFT > PAGE_SHIFT));
#ifdef CONFIG_HIGHMEM
-#ifdef CONFIG_DISCONTIGMEM
-#error "CONFIG_HIGHMEM and CONFIG_DISCONTIGMEM dont work together yet"
-#endif
max_mapnr = highend_pfn ? highend_pfn : max_low_pfn;
#else
max_mapnr = max_low_pfn;
diff --git a/arch/nds32/include/asm/memory.h b/arch/nds32/include/asm/memory.h
index 940d32842793..62faafbc28e4 100644
--- a/arch/nds32/include/asm/memory.h
+++ b/arch/nds32/include/asm/memory.h
@@ -76,18 +76,12 @@
* virt_to_page(k) convert a _valid_ virtual address to struct page *
* virt_addr_valid(k) indicates whether a virtual address is valid
*/
-#ifndef CONFIG_DISCONTIGMEM
-
#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET
#define pfn_valid(pfn) ((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr))
#define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
#define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
-#else /* CONFIG_DISCONTIGMEM */
-#error CONFIG_DISCONTIGMEM is not supported yet.
-#endif /* !CONFIG_DISCONTIGMEM */
-
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#endif
diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h
index 09c56cba442e..5a42d663612b 100644
--- a/arch/xtensa/include/asm/page.h
+++ b/arch/xtensa/include/asm/page.h
@@ -181,10 +181,6 @@ static inline unsigned long ___pa(unsigned long va)
#define pfn_valid(pfn) \
((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
-#ifdef CONFIG_DISCONTIGMEM
-# error CONFIG_DISCONTIGMEM not supported
-#endif
-
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 61f2f6ff9467..c89f8456f18d 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -471,8 +471,8 @@ static inline int gfp_zonelist(gfp_t flags)
* There are two zonelists per node, one for all zones with memory and
* one containing just zones from the node the zonelist belongs to.
*
- * For the normal case of non-DISCONTIGMEM systems the NODE_DATA() gets
- * optimized to &contig_page_data at compile-time.
+ * For the case of non-NUMA systems the NODE_DATA() gets optimized to
+ * &contig_page_data at compile-time.
*/
static inline struct zonelist *node_zonelist(int nid, gfp_t flags)
{
