linux-stable/arch/arc
Vladimir Isaev 1d5e4640e5 ARC: mm: Use max_high_pfn as a HIGHMEM zone border
Commit 4af22ded0e ("arc: fix memory initialization for systems
with two memory banks") fixed highmem, but for the PAE case it causes
bug messages:

| BUG: Bad page state in process swapper  pfn:80000
| page:(ptrval) refcount:0 mapcount:1 mapping:00000000 index:0x0 pfn:0x80000 flags: 0x0()
| raw: 00000000 00000100 00000122 00000000 00000000 00000000 00000000 00000000
| raw: 00000000
| page dumped because: nonzero mapcount
| Modules linked in:
| CPU: 0 PID: 0 Comm: swapper Not tainted 5.12.0-rc5-00003-g1e43c377a79f #1

This is because the fix expects highmem to be always less than
lowmem and uses min_low_pfn as an upper zone border for highmem.

max_high_pfn should be ok for both highmem and highmem+PAE cases.

Fixes: 4af22ded0e ("arc: fix memory initialization for systems with two memory banks")
Signed-off-by: Vladimir Isaev <isaev@synopsys.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: stable@vger.kernel.org  #5.8 onwards
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2021-05-10 12:38:59 -07:00
..
boot ARC: haps: bump memory to 1 GB 2021-03-12 07:22:23 -08:00
configs ARC: [plat-eznps]: Drop support for EZChip NPS platform 2020-10-05 21:02:29 -07:00
include ARC: mm: PAE: use 40-bit physical page mask 2021-05-10 12:38:59 -07:00
kernel ARC: entry: fix off-by-one error in syscall number validation 2021-05-10 12:38:59 -07:00
lib treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mm ARC: mm: Use max_high_pfn as a HIGHMEM zone border 2021-05-10 12:38:59 -07:00
plat-axs10x treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
plat-hsdk ARC: [hsdk]: Enable FPU_SAVE_RESTORE 2021-01-08 13:46:58 -08:00
plat-sim ARC: merge HAPS-HS with nSIM-HS configs 2019-10-28 12:12:31 -07:00
plat-tb10x treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
Kbuild treewide: Add SPDX license identifier - Kbuild 2019-05-30 11:32:33 -07:00
Kconfig mm: drop redundant HAVE_ARCH_TRANSPARENT_HUGEPAGE 2021-05-05 11:27:25 -07:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile arc: Fix typos/spellos 2021-05-10 12:38:59 -07:00