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arch, mm: remove stale mentions of DISCONIGMEM 

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@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport 2021-06-28 19:42:55 -07:00 committed by Linus Torvalds
parent bb1c50d396
commit d3c251ab95
7 changed files with 6 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/ia64/kernel/topology.c
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@ -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@ess.nec.de>
* Populate cpu entries in sysfs for non-numa systems as well
* Intel Corporation - Ashok Raj

5
arch/ia64/mm/numa.c
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@ -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@ess.nec.de>
*/

6
arch/mips/include/asm/mmzone.h
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@ -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_ */

3
arch/mips/mm/init.c
View File

@ -454,9 +454,6 @@ 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;

6
arch/nds32/include/asm/memory.h
View File

@ -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

4
arch/xtensa/include/asm/page.h
View File

@ -192,10 +192,6 @@ 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)

4
include/linux/gfp.h
View File

@ -494,8 +494,8 @@ 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)
{