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James Hogan a2cee580a5 MIPS: smp.c: Fix uninitialised temp_foreign_map 
commit d825c06bfe upstream.

When calculate_cpu_foreign_map() recalculates the cpu_foreign_map
cpumask it uses the local variable temp_foreign_map without initialising
it to zero. Since the calculation only ever sets bits in this cpumask
any existing bits at that memory location will remain set and find their
way into cpu_foreign_map too. This could potentially lead to cache
operations suboptimally doing smp calls to multiple VPEs in the same
core, even though the VPEs share primary caches.

Therefore initialise temp_foreign_map using cpumask_clear() before use.

Fixes: cccf34e941 ("MIPS: c-r4k: Fix cache flushing for MT cores")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12759/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-03-16 08:43:01 -07:00
..
alchemy genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
ar7 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
ath25 genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
ath79 MIPS: ath79: Add a machine entry for booting OF machines 2015-11-20 15:44:57 +01:00
bcm47xx Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-11-15 09:10:53 -08:00
bcm63xx Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-11-15 09:10:53 -08:00
bmips MIPS: Make MIPS_CMDLINE_DTB default 2015-11-11 08:38:37 +01:00
boot MIPS: ath79: Fix the size of the MISC INTC registers in ar9132.dtsi 2015-11-20 12:14:27 +01:00
cavium-octeon Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-11-15 09:10:53 -08:00
cobalt MIPS: Cobalt Don't use module_init in non-modular MTD registration. 2015-06-21 22:14:30 +02:00
configs Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-11-15 09:10:53 -08:00
dec MIPS: DEC: Do not set up the FPU interrupt if no FPU 2015-04-08 01:10:46 +02:00
emma
fw MIPS: ARC: Use __noreturn / unreachable in ARC termination functions. 2015-01-13 16:04:27 +01:00
include MIPS: Fix buffer overflow in syscall_get_arguments() 2016-03-03 15:07:17 -08:00
jazz MIPS: Jazz: Migrate to new 'set-state' interface 2015-09-03 12:07:50 +02:00
jz4740 MIPS: JZ4740: Remove unused linux/leds_pwm.h include 2015-10-26 09:49:44 +01:00
kernel MIPS: smp.c: Fix uninitialised temp_foreign_map 2016-03-16 08:43:01 -07:00
kvm mips/kvm: fix ioctl error handling 2016-03-09 15:34:50 -08:00
lantiq MIPS: Make MIPS_CMDLINE_DTB default 2015-11-11 08:38:37 +01:00
lasat MIPS: Lasat: Move from deprecated __initcall to arch_initcall. 2015-09-03 12:07:49 +02:00
lib MIPS: uaccess: Take EVA into account in [__]clear_user 2015-12-22 11:58:43 +01:00
loongson32 MIPS: loongsoon32: Migrate to new 'set-state' interface 2015-09-03 12:07:53 +02:00
loongson64 MIPS: hpet: Choose a safe value for the ETIME check 2016-03-03 15:07:17 -08:00
math-emu MIPS: Declare mips_debugfs_dir in a header 2015-10-26 09:49:42 +01:00
mm MIPS: scache: Fix scache init with invalid line size. 2016-03-09 15:34:55 -08:00
mti-malta MIPS: Malta: Register UP SMP ops if all else fails 2015-11-11 08:35:49 +01:00
mti-sead3 LED/MIPS: Move SEAD3 LED driver to where it belongs. 2015-11-03 08:59:20 +01:00
net net: filter: make JITs zero A for SKF_AD_ALU_XOR_X 2016-01-06 00:43:52 -05:00
netlogic MIPS: Make MIPS_CMDLINE_DTB default 2015-11-11 08:38:37 +01:00
oprofile MIPS: Add cases for CPU_I6400 2015-08-26 15:23:03 +02:00
paravirt MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
pci MIPS: Fix build error due to unused variables. 2015-12-22 15:21:18 +01:00
pistachio Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-11-15 09:10:53 -08:00
pmcs-msp71xx MIPS: Fix build error due to unused variables. 2015-12-22 15:21:18 +01:00
pnx833x
power MIPS: Hibernate: flush TLB entries earlier 2015-04-10 15:41:52 +02:00
ralink Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-11-15 09:10:53 -08:00
rb532 MIPS: Remove all the uses of custom gpio.h 2015-09-03 12:08:02 +02:00
sgi-ip22 MIPS: ip22-gio: Remove legacy suspend/resume support 2015-02-20 13:30:55 +01:00
sgi-ip27 MIPS: IP27: Migrate to new 'set-state' interface 2015-09-03 12:07:54 +02:00
sgi-ip32 MIPS: IP32: Fix build errors in reset code in DS1685 platform hook. 2015-05-13 00:01:41 +02:00
sibyte MIPS: Sibyte: Move bus watcher from deprecated __initcall to device_initcall 2015-09-03 12:07:49 +02:00
sni MIPS: Fix build error due to unused variables. 2015-12-22 15:21:18 +01:00
txx9 spi: Drop owner assignment from spi_drivers 2015-10-28 10:30:17 +09:00
vdso MIPS: VDSO: Fix build error with binutils 2.24 and earlier 2015-12-29 23:41:55 +01:00
vr41xx MIPS/IRQCHIP: Move irq_chip from arch/mips to drivers/irqchip. 2015-06-21 21:52:50 +02:00
xilfpga Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-11-15 09:10:53 -08:00
Kbuild MIPS: Initial implementation of a VDSO 2015-11-11 08:36:36 +01:00
Kbuild.platforms MIPS: xilfpga: Add mipsfpga platform code 2015-11-11 08:38:44 +01:00
Kconfig MIPS: Fix build error when SMP is used without GIC 2016-03-16 08:43:01 -07:00
Kconfig.debug MIPS: CPS: Early debug using an ns16550-compatible UART 2015-11-11 08:34:25 +01:00
Makefile MIPS: Allow compact branch policy to be changed 2015-10-26 09:49:40 +01:00