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linux-next/arch/arm/mm
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Stephen Boyd ee4de5d99a ARM: 7781/1: mmu: Add debug_ll_io_init() mappings to early mappings 
Failure to add the mapping created in debug_ll_io_init() can lead
to the BUG_ON() triggering in lib/ioremap.c:27 if the static
virtual address decided for the debug_ll mapping overlaps with
another mapping that is created later. This happens because the
generic ioremap code has no idea there is a mapping there and it
tries to place a mapping in the same location and blows up when
it sees that there is a pte already present.

kernel BUG at lib/ioremap.c:27!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.0-rc2-00042-g2af0c67-dirty #316
task: ef088000 ti: ef082000 task.ti: ef082000
PC is at ioremap_page_range+0x16c/0x198
LR is at ioremap_page_range+0xf0/0x198
pc : [<c04cb874>]    lr : [<c04cb7f8>]    psr: 20000113
sp : ef083e78  ip : af140000  fp : ef083ebc
r10: ef7fc100  r9 : ef7fc104  r8 : 000af174
r7 : 00000647  r6 : beffffff  r5 : f004c000  r4 : f0040000
r3 : af173417  r2 : 16440653  r1 : af173e07  r0 : ef7fc8fc
Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c5787d  Table: 8020406a  DAC: 00000015
Process swapper/0 (pid: 1, stack limit = 0xef082238)
Stack: (0xef083e78 to 0xef084000)
3e60:                                                       00040000 ef083eec
3e80: bf134000 f004bfff c0207c00 f004c000 c02fc120 f000c000 c15e7800 00040000
3ea0: ef083eec 00000647 c098ba9c c0953544 ef083edc ef083ec0 c021b82c c04cb714
3ec0: c09cdc50 00000040 ef0f1e00 ef1003c0 ef083f14 ef083ee0 c09535bc c021b7bc
3ee0: c0953544 c04d0c6c c094e2cc c1600be4 c07440c4 c09a6888 00000002 c0a15f00
3f00: ef082000 00000000 ef083f54 ef083f18 c0208728 c0953550 00000002 c1600bfc
3f20: c08e3fac c0839918 ef083f54 c1600b80 c09a6888 c0a15f00 0000008b c094e2cc
3f40: c098ba9c c098bab8 ef083f94 ef083f58 c094ea0c c020865c 00000002 00000002
3f60: c094e2cc 00000000 c025b674 00000000 c06ff860 00000000 00000000 00000000
3f80: 00000000 00000000 ef083fac ef083f98 c06ff878 c094e910 00000000 00000000
3fa0: 00000000 ef083fb0 c020efe8 c06ff86c 00000000 00000000 00000000 00000000
3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 c0595108
[<c04cb874>] (ioremap_page_range+0x16c/0x198) from [<c021b82c>] (__alloc_remap_buffer.isra.18+0x7c/0xc4)
[<c021b82c>] (__alloc_remap_buffer.isra.18+0x7c/0xc4) from [<c09535bc>] (atomic_pool_init+0x78/0x128)
[<c09535bc>] (atomic_pool_init+0x78/0x128) from [<c0208728>] (do_one_initcall+0xd8/0x198)
[<c0208728>] (do_one_initcall+0xd8/0x198) from [<c094ea0c>] (kernel_init_freeable+0x108/0x1d0)
[<c094ea0c>] (kernel_init_freeable+0x108/0x1d0) from [<c06ff878>] (kernel_init+0x18/0xf4)
[<c06ff878>] (kernel_init+0x18/0xf4) from [<c020efe8>] (ret_from_fork+0x14/0x20)
Code: e50b0040 ebf54b2f e51b0040 eaffffee (e7f001f2)

Fix it by telling generic layers about the static mapping via
iotable_init().  This also has the nice side effect of letting
you see the mapping in procfs' vmallocinfo file.

Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-07-09 09:51:35 +01:00
..
abort-ev4.S ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
abort-ev4t.S ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
abort-ev5t.S ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
abort-ev5tj.S ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
abort-ev6.S ARM: 7396/1: errata: only handle ARM erratum #326103 on affected cores 2012-04-23 14:21:52 +01:00
abort-ev7.S ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
abort-lv4t.S ARM: entry: data abort: ensure r5 is preserved by abort functions 2011-07-02 10:56:12 +01:00
abort-macro.S ARM: 7088/1: entry: fix wrong parameter name used in do_thumb_abort 2011-09-10 23:39:56 +01:00
abort-nommu.S ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
alignment.c Merge branch 'for-next' of git://git.pengutronix.de/git/ukl/linux into devel-stable 2013-03-09 15:49:32 +00:00
cache-aurora-l2.h ARM: 7547/4: cache-l2x0: add support for Aurora L2 cache ctrl 2012-11-06 19:47:35 +00:00
cache-fa.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
cache-feroceon-l2.c ARM: 7696/1: Fix kexec by setting outer_cache.inv_all for Feroceon 2013-04-17 16:53:27 +01:00
cache-l2x0.c ARM: 7682/1: cache-l2x0: fix masking of RTL revision numbering and set_debug init 2013-04-03 16:45:48 +01:00
cache-tauros2.c ARM: cache: add dt support for tauros2 cache 2012-08-16 16:16:50 +08:00
cache-v4.S ARM: mm: remove broken condition check for v4 flushing 2013-03-26 09:55:34 +00:00
cache-v4wb.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
cache-v4wt.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
cache-v6.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
cache-v7.S ARM: 7752/1: errata: LoUIS bit field in CLIDR register is incorrect 2013-06-17 10:30:49 +01:00
cache-xsc3l2.c ARM: move CP15 definitions to separate header file 2012-03-28 18:30:01 +01:00
context.c ARM: 7684/1: errata: Workaround for Cortex-A15 erratum 798181 (TLBI/DSB operations) 2013-04-03 16:45:49 +01:00
copypage-fa.c arm: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:14 +08:00
copypage-feroceon.c arm: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:14 +08:00
copypage-v4mc.c Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
copypage-v4wb.c arm: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:14 +08:00
copypage-v4wt.c arm: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:14 +08:00
copypage-v6.c Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
copypage-xsc3.c arm: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:14 +08:00
copypage-xscale.c Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
dma-mapping.c Merge branches 'devel-stable', 'entry', 'fixes', 'mach-types', 'misc' and 'smp-hotplug' into for-linus 2013-05-02 21:30:36 +01:00
extable.c
fault-armv.c mm: replace vma prio_tree with an interval tree 2012-10-09 16:22:39 +09:00
fault.c readahead: fault retry breaks mmap file read random detection 2012-10-09 16:22:47 +09:00
fault.h ARM: LPAE: Add fault handling support 2011-12-08 10:30:40 +00:00
flush.c ARM: 7755/1: handle user space mapped pages in flush_kernel_dcache_page 2013-06-17 10:30:52 +01:00
fsr-2level.c ARM: LPAE: Move the FSR definitions to separate files 2011-12-08 10:30:37 +00:00
fsr-3level.c ARM: LPAE: Add fault handling support 2011-12-08 10:30:40 +00:00
highmem.c Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
idmap.c ARM: KVM: move to a KVM provided HYP idmap 2013-04-28 22:23:08 -07:00
init.c mm/ARM: use free_highmem_page() to free highmem pages into buddy system 2013-04-29 15:54:31 -07:00
iomap.c arm/PCI: remove arch pci_flags definition 2012-02-23 20:18:56 -07:00
ioremap.c ARM: 7646/1: mm: use static_vm for managing static mapped areas 2013-02-16 17:54:22 +00:00
Kconfig Merge branches 'devel-stable', 'entry', 'fixes', 'mach-types', 'misc' and 'smp-hotplug' into for-linus 2013-05-02 21:30:36 +01:00
Makefile ARM: cache: remove ARMv3 support code 2013-03-26 09:55:23 +00:00
mm.h ARM: 7645/1: ioremap: introduce an infrastructure for static mapped area 2013-02-16 17:54:22 +00:00
mmap.c Merge branch 'akpm' (Andrew's patchbomb) 2012-12-11 18:05:37 -08:00
mmu.c ARM: 7781/1: mmu: Add debug_ll_io_init() mappings to early mappings 2013-07-09 09:51:35 +01:00
nommu.c ARM: 7772/1: Fix missing flush_kernel_dcache_page() for noMMU 2013-06-24 14:28:44 +01:00
pabort-legacy.S ARM: entry: prefetch abort: tail-call the main prefetch abort handler 2011-07-02 10:56:10 +01:00
pabort-v6.S ARM: entry: prefetch abort: tail-call the main prefetch abort handler 2011-07-02 10:56:10 +01:00
pabort-v7.S ARM: entry: prefetch abort: tail-call the main prefetch abort handler 2011-07-02 10:56:10 +01:00
pgd.c ARM: move CP15 definitions to separate header file 2012-03-28 18:30:01 +01:00
proc-arm7tdmi.S ARM: proc-*.S: place cpu_reset functions into .idmap.text section 2011-12-06 14:04:14 +00:00
proc-arm9tdmi.S ARM: proc-*.S: place cpu_reset functions into .idmap.text section 2011-12-06 14:04:14 +00:00
proc-arm720.S ARM: proc-*.S: place cpu_reset functions into .idmap.text section 2011-12-06 14:04:14 +00:00
proc-arm740.S ARM: mm: fix numerous hideous errors in proc-arm740.S 2013-03-26 09:55:33 +00:00
proc-arm920.S ARM: Do 15e0d9e37c (ARM: pm: let platforms select cpu_suspend support) properly 2013-04-08 12:00:38 +01:00
proc-arm922.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
proc-arm925.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
proc-arm926.S ARM: Do 15e0d9e37c (ARM: pm: let platforms select cpu_suspend support) properly 2013-04-08 12:00:38 +01:00
proc-arm940.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
proc-arm946.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
proc-arm1020.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
proc-arm1020e.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
proc-arm1022.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
proc-arm1026.S ARM: mm: implement LoUIS API for cache maintenance ops 2012-09-25 11:20:25 +01:00
proc-fa526.S ARM: 7760/1: cpu_fa526_do_idle: remove WFI 2013-06-24 14:25:41 +01:00
proc-feroceon.S ARM: 7542/1: mm: fix cache LoUIS API for xscale and feroceon 2012-09-28 21:09:50 +01:00
proc-macros.S ARM: 7773/1: PJ4B: Add support for errata 4742 2013-06-24 14:28:46 +01:00
proc-mohawk.S ARM: Do 15e0d9e37c (ARM: pm: let platforms select cpu_suspend support) properly 2013-04-08 12:00:38 +01:00
proc-sa110.S ARM: proc-*.S: place cpu_reset functions into .idmap.text section 2011-12-06 14:04:14 +00:00
proc-sa1100.S ARM: Do 15e0d9e37c (ARM: pm: let platforms select cpu_suspend support) properly 2013-04-08 12:00:38 +01:00
proc-syms.c ARM: modules: don't export cpu_set_pte_ext when !MMU 2013-03-26 09:55:34 +00:00
proc-v6.S Merge branches 'devel-stable', 'entry', 'fixes', 'mach-types', 'misc' and 'smp-hotplug' into for-linus 2013-05-02 21:30:36 +01:00
proc-v7-2level.S ARM: 7691/1: mm: kill unused TLB_CAN_READ_FROM_L1_CACHE and use ALT_SMP instead 2013-04-03 17:39:07 +01:00
proc-v7-3level.S ARM: 7691/1: mm: kill unused TLB_CAN_READ_FROM_L1_CACHE and use ALT_SMP instead 2013-04-03 17:39:07 +01:00
proc-v7.S ARM: 7773/1: PJ4B: Add support for errata 4742 2013-06-24 14:28:46 +01:00
proc-xsc3.S ARM: Do 15e0d9e37c (ARM: pm: let platforms select cpu_suspend support) properly 2013-04-08 12:00:38 +01:00
proc-xscale.S ARM: Do 15e0d9e37c (ARM: pm: let platforms select cpu_suspend support) properly 2013-04-08 12:00:38 +01:00
tcm.h ARM: 7694/1: ARM, TCM: initialize TCM in paging_init(), instead of setup_arch() 2013-04-17 16:53:24 +01:00
tlb-fa.S Merge branch 'devel-stable' into for-next 2011-07-22 23:09:07 +01:00
tlb-v4.S ARM: mm: tlb-v4: Use the new processor struct macros 2011-07-07 15:31:12 +01:00
tlb-v4wb.S ARM: mm: tlb-v4wb: Use the new processor struct macros 2011-07-07 15:31:12 +01:00
tlb-v4wbi.S ARM: mm: tlb-v4wbi: Use the new processor struct macros 2011-07-07 15:31:12 +01:00
tlb-v6.S Merge branch 'devel-stable' into for-next 2011-07-22 23:09:07 +01:00
tlb-v7.S ARM: 7489/1: errata: fix workaround for erratum #720789 on UP systems 2012-08-11 09:16:00 +01:00