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Jerin Jacob d451e73496 MIPS: DMA: Fix BUG due to smp_processor_id() in preemptible code 
The use of current_cpu_type() in cpu_is_noncoherent_r10000() is not preemption-safe.
Use boot_cpu_type() instead to make it preemption-safe.

<log>
/ # insmod mtd_readtest.ko dev=4
mtd_readtest: MTD device: 4
mtd_readtest: MTD device size 996671488, eraseblock size 524288, page size 4096, count of eraseblocks 1901, pages per eraseblock 128, OOB size 224
mtd_readtest: scanning for bad eraseblocks
mtd_readtest: scanned 1901 eraseblocks, 0 are bad
mtd_readtest: testing page read
BUG: using smp_processor_id() in preemptible [00000000] code: insmod/99
caller is mips_dma_sync_single_for_cpu+0x2c/0x128
CPU: 2 PID: 99 Comm: insmod Not tainted 3.10.4 #67
Stack : 00000006 69735f63 00000000 00000000 00000000 00000000 808273d6 00000032
          80820000 00000002 8d700000 8de48fa0 00000000 00000000 00000000 00000000
          00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
          00000000 00000000 00000000 8d6afb00 8d6afb24 80721f24 807b9927 8012c130
          80820000 80721f24 00000002 00000063 8de48fa0 8082333c 807b98e6 8d6afaa0
          ...
Call Trace:
[<80109984>] show_stack+0x64/0x7c
[<80666230>] dump_stack+0x20/0x2c
[<803a2210>] debug_smp_processor_id+0xe0/0xf0
[<801116f0>] mips_dma_sync_single_for_cpu+0x2c/0x128
[<8043456c>] nand_plat_read_page+0x16c/0x234
[<8042fad4>] nand_do_read_ops+0x194/0x480
[<804301dc>] nand_read+0x50/0x7c
[<804261c8>] part_read+0x70/0xc0
[<804231dc>] mtd_read+0x80/0xe4
[<c0431354>] init_module+0x354/0x6f8 [mtd_readtest]
[<8010057c>] do_one_initcall+0x140/0x1a4
[<80176d7c>] load_module+0x1b5c/0x2258
[<8017752c>] SyS_init_module+0xb4/0xec
[<8010f3fc>] stack_done+0x20/0x44

BUG: using smp_processor_id() in preemptible [00000000] code: insmod/99
</log>

Signed-off-by: Jerin Jacob <jerinjacobk@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5800/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-09-06 19:07:11 +02:00
..
alpha alpha: Use handle_percpu_irq for the timer interrupt 2013-07-19 13:54:26 -07:00
arc ARC: [lib] strchr breakage in Big-endian configuration 2013-08-24 11:24:53 -07:00
arm Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2013-08-25 12:41:37 -07:00
arm64 Perf backend fixes for arm64 where the user can cause kernel panic 2013-08-21 16:36:32 -07:00
avr32 avr32: boards/atngw100/mrmt.c: fix building error 2013-08-08 14:16:22 +02:00
blackfin Merge branch 'cpuinit_phase2' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2013-07-18 10:50:26 -07:00
c6x Merge branch 'akpm' (updates from Andrew Morton) 2013-07-03 17:12:13 -07:00
cris cris: delete __cpuinit usage from all cris files 2013-07-14 19:36:54 -04:00
frv frv: delete __cpuinit usage from all frv files 2013-07-14 19:36:55 -04:00
h8300 net: rename busy poll socket op and globals 2013-07-10 17:08:27 -07:00
hexagon arch: *: Kconfig: add "kernel/Kconfig.freezer" to "arch/*/Kconfig" 2013-08-13 17:57:49 -07:00
ia64 Fix TLB gather virtual address range invalidation corner cases 2013-08-16 08:52:46 -07:00
m32r m32r: delete __cpuinit usage from all m32r files 2013-07-14 19:36:55 -04:00
m68k m68k: Truncate base in do_div() 2013-08-14 11:46:30 +02:00
metag metag: delete __cpuinit usage from all metag files 2013-07-14 19:36:54 -04:00
microblaze microblaze: fix clone syscall 2013-08-13 17:57:48 -07:00
mips MIPS: DMA: Fix BUG due to smp_processor_id() in preemptible code 2013-09-06 19:07:11 +02:00
mn10300 net: rename busy poll socket op and globals 2013-07-10 17:08:27 -07:00
openrisc arch: *: Kconfig: add "kernel/Kconfig.freezer" to "arch/*/Kconfig" 2013-08-13 17:57:49 -07:00
parisc parisc: Fix interrupt routing for C8000 serial ports 2013-07-31 23:42:32 +02:00
powerpc powerpc/tm: Fix context switching TAR, PPR and DSCR SPRs 2013-08-09 18:07:12 +10:00
s390 s390: Fix broken build 2013-08-16 21:16:37 -07:00
score arch: *: Kconfig: add "kernel/Kconfig.freezer" to "arch/*/Kconfig" 2013-08-13 17:57:49 -07:00
sh Fix TLB gather virtual address range invalidation corner cases 2013-08-16 08:52:46 -07:00
sparc sparc: delete __cpuinit/__CPUINIT usage from all users 2013-07-14 19:36:52 -04:00
tile tile: delete __cpuinit usage from all tile files 2013-07-14 19:36:54 -04:00
um Fix TLB gather virtual address range invalidation corner cases 2013-08-16 08:52:46 -07:00
unicore32 reboot: move arch/x86 reboot= handling to generic kernel 2013-07-09 10:33:29 -07:00
x86 x86 get_unmapped_area: Access mmap_legacy_base through mm_struct member 2013-08-22 10:19:35 -07:00
xtensa xtensa: delete __cpuinit usage from all xtensa files 2013-07-14 19:36:56 -04:00
.gitignore
Kconfig microblaze: fix clone syscall 2013-08-13 17:57:48 -07:00