Max Filippov a5ecf56cb2 xtensa: fix high memory/reserved memory collision ... commit 6ac5a11dc6 upstream. Xtensa memory initialization code frees high memory pages without checking whether they are in the reserved memory regions or not. That results in invalid value of totalram_pages and duplicate page usage by CMA and highmem. It produces a bunch of BUGs at startup looking like this: BUG: Bad page state in process swapper pfn:70800 page:be60c000 count:0 mapcount:-127 mapping: (null) index:0x1 flags: 0x80000000() raw: 80000000 00000000 00000001 ffffff80 00000000 be60c014 be60c014 0000000a page dumped because: nonzero mapcount Modules linked in: CPU: 0 PID: 1 Comm: swapper Tainted: G B 4.16.0-rc1-00015-g7928b2cbe55b-dirty #23 Stack: bd839d33 00000000 00000018 ba97b64c a106578c bd839d70 be60c000 00000000 a1378054 bd86a000 00000003 ba97b64c a1066166 bd839da0 be60c000 ffe00000 a1066b58 bd839dc0 be504000 00000000 000002f4 bd838000 00000000 0000001e Call Trace: [<a1065734>] bad_page+0xac/0xd0 [<a106578c>] free_pages_check_bad+0x34/0x4c [<a1066166>] __free_pages_ok+0xae/0x14c [<a1066b58>] __free_pages+0x30/0x64 [<a1365de5>] init_cma_reserved_pageblock+0x35/0x44 [<a13682dc>] cma_init_reserved_areas+0xf4/0x148 [<a10034b8>] do_one_initcall+0x80/0xf8 [<a1361c16>] kernel_init_freeable+0xda/0x13c [<a125b59d>] kernel_init+0x9/0xd0 [<a1004304>] ret_from_kernel_thread+0xc/0x18 Only free high memory pages that are not reserved. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-02-28 10:18:30 +01:00
..
boot	xtensa: rearrange CCOUNT calibration	2016-09-20 18:52:59 -07:00
configs	xtensa: add default memmap and mmio32native options to defconfigs	2016-09-20 20:43:24 -07:00
include	xtensa: fix futex_atomic_cmpxchg_inatomic	2018-02-17 13:21:19 +01:00
kernel	xtensa: don't limit csum_partial export by CONFIG_NET	2017-08-16 13:43:16 -07:00
lib	xtensa: fixes for configs without loop option	2015-11-02 18:02:47 +03:00
mm	xtensa: fix high memory/reserved memory collision	2018-02-28 10:18:30 +01:00
oprofile	xtensa: move oprofile stack tracing to stacktrace.c	2015-08-17 07:32:49 +03:00
platforms	xtensa: don't use linux IRQ #0	2017-06-17 06:41:58 +02:00
variants	xtensa: Added Cadence CSP kernel configuration for Xtensa	2016-09-09 18:39:09 -07:00
Kconfig	xtensa: disable MMU initialization option on MMUv2 cores	2016-09-29 12:55:00 -07:00
Kconfig.debug	xtensa: disable link optimization	2014-12-15 23:47:24 -08:00
Makefile	xtensa: define CONFIG_CPU_{BIG,LITTLE}_ENDIAN	2016-03-11 08:53:31 +00:00