linux/arch/mips/kernel
James Hogan d825c06bfe MIPS: smp.c: Fix uninitialised temp_foreign_map
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>
2016-03-13 10:59:19 +01:00
..
.gitignore
8250-platform.c
Makefile MIPS: CPS: Early debug using an ns16550-compatible UART 2015-11-11 08:34:25 +01:00
asm-offsets.c MIPS: Set trap_no field in thread_struct on exception. 2015-09-03 12:08:04 +02:00
binfmt_elfn32.c mips: Differentiate between 32 and 64 bit ELF header 2016-02-11 11:38:22 +01:00
binfmt_elfo32.c mips: Differentiate between 32 and 64 bit ELF header 2016-02-11 11:38:22 +01:00
bmips_vec.S
branch.c
cevt-bcm1480.c MIPS: cevt-bcm1480: Migrate to new 'set-state' interface 2015-09-03 12:07:51 +02:00
cevt-ds1287.c MIPS: cevt-ds1287: Migrate to new 'set-state' interface 2015-09-03 12:07:51 +02:00
cevt-gt641xx.c MIPS: cevt-gt641xx: Migrate to new 'set-state' interface 2015-09-03 12:07:51 +02:00
cevt-r4k.c MIPS: cevt-r4k: Migrate to new 'set-state' interface 2015-09-03 12:07:52 +02:00
cevt-sb1250.c MIPS: cevt-sb1250: Migrate to new 'set-state' interface 2015-09-03 12:07:52 +02:00
cevt-txx9.c MIPS: cevt-txx9: Migrate to new 'set-state' interface 2015-09-03 12:07:53 +02:00
cps-vec-ns16550.S MIPS: CPS: Early debug using an ns16550-compatible UART 2015-11-11 08:34:25 +01:00
cps-vec.S MIPS: CPS: drop .set mips64r2 directives 2015-12-22 12:16:32 +01:00
cpu-bugs64.c MIPS: Use EXCCODE_ constants with set_except_vector() 2016-01-24 03:28:21 +01:00
cpu-probe.c MIPS: Add IEEE Std 754 conformance mode selection 2016-01-20 00:39:20 +01:00
crash.c
crash_dump.c
csrc-bcm1480.c
csrc-ioasic.c
csrc-r4k.c MIPS: VDSO: Add implementations of gettimeofday() and clock_gettime() 2015-11-11 08:36:41 +01:00
csrc-sb1250.c
early_printk.c
early_printk_8250.c
elf.c MIPS: Add IEEE Std 754 conformance mode selection 2016-01-20 00:39:20 +01:00
entry.S
ftrace.c
genex.S MIPS: Fix LLVM build issue. 2015-08-18 11:40:20 +02:00
gpio_txx9.c MIPS: TXx9: Be sure to clamp return value 2016-01-24 02:22:14 +01:00
head.S
i8253.c
idle.c Merge branch '4.3-fixes' into mips-for-linux-next 2015-11-12 11:36:03 +01:00
irq-gt641xx.c
irq-msc01.c
irq-rm7000.c
irq.c
irq_txx9.c
jump_label.c jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP} 2015-08-03 11:34:12 +02:00
kgdb.c
kprobes.c
linux32.c
machine_kexec.c
mcount.S
mips-cm.c MIPS: CM, CPC: Ensure core-other GCRs reflect the correct core 2015-11-11 08:35:18 +01:00
mips-cpc.c MIPS: CM, CPC: Ensure core-other GCRs reflect the correct core 2015-11-11 08:35:18 +01:00
mips-mt-fpaff.c MIPS: Fix sched_getaffinity with MT FPAFF enabled 2015-08-03 09:25:02 +02:00
mips-mt.c
mips-r2-to-r6-emul.c MIPS: Declare mips_debugfs_dir in a header 2015-10-26 09:49:42 +01:00
mips_ksyms.c MIPS: uaccess: Take EVA into account in [__]clear_user 2015-12-22 11:58:43 +01:00
mips_machine.c
module-rela.c
module.c
octeon_switch.S MIPS: Fix octeon FP context switch handling 2015-10-02 19:16:06 +02:00
perf_event.c
perf_event_mipsxx.c MIPS: Add cases for CPU_I6400 2015-08-26 15:23:03 +02:00
pm-cps.c MIPS: Add cases for CPU_I6400 2015-08-26 15:23:03 +02:00
pm.c
proc.c
process.c MIPS: Properly disable FPU in start_thread() 2016-02-01 23:36:03 +01:00
prom.c MIPS: Fix build with CONFIG_OF=y for non OF-enabled targets 2015-08-03 09:25:00 +02:00
ptrace.c MIPS: ptrace: Drop cp0_tcstatus from regoffset_table[] 2016-01-24 02:24:24 +01:00
ptrace32.c
r4k_fpu.S MIPS: Avoid variant of .type unsupported by LLVM Assembler 2016-02-29 11:23:49 +01:00
r4k_switch.S MIPS: Tidy up FPU context switching 2015-09-03 12:08:05 +02:00
r2300_fpu.S MIPS: Avoid variant of .type unsupported by LLVM Assembler 2016-02-29 11:23:49 +01:00
r2300_switch.S MIPS: Fix R2300 FP context switch handling 2015-10-02 19:16:46 +02:00
r6000_fpu.S
relocate_kernel.S MIPS: Replace add and sub instructions in relocate_kernel.S with addiu 2015-08-03 15:26:30 +02:00
reset.c
rtlx-cmp.c
rtlx-mt.c
rtlx.c
scall32-o32.S MIPS: Wire up copy_file_range syscall. 2016-02-05 17:15:42 +01:00
scall64-64.S MIPS: Wire up copy_file_range syscall. 2016-02-05 17:15:42 +01:00
scall64-n32.S MIPS: Wire up copy_file_range syscall. 2016-02-05 17:15:42 +01:00
scall64-o32.S MIPS: Wire up copy_file_range syscall. 2016-02-05 17:15:42 +01:00
segment.c MIPS: Declare mips_debugfs_dir in a header 2015-10-26 09:49:42 +01:00
setup.c MIPS: Fix early CM probing 2016-02-09 17:18:31 +01:00
signal-common.h MIPS: Save MSA extended context around signals 2015-09-03 12:07:59 +02:00
signal.c MIPS: Initial implementation of a VDSO 2015-11-11 08:36:36 +01:00
signal32.c MIPS: Initial implementation of a VDSO 2015-11-11 08:36:36 +01:00
signal_n32.c MIPS: Initial implementation of a VDSO 2015-11-11 08:36:36 +01:00
smp-bmips.c MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
smp-cmp.c
smp-cps.c MIPS: smp-cps: Ensure secondary cores start with EVA disabled 2016-01-24 02:09:53 +01:00
smp-gic.c MIPS: CM: make use of mips_cm_{lock,unlock}_other 2015-11-11 08:35:17 +01:00
smp-mt.c
smp-up.c
smp.c MIPS: smp.c: Fix uninitialised temp_foreign_map 2016-03-13 10:59:19 +01:00
spinlock_test.c MIPS: Declare mips_debugfs_dir in a header 2015-10-26 09:49:42 +01:00
spram.c MIPS: Add cases for CPU_I6400 2015-08-26 15:23:03 +02:00
stacktrace.c MIPS: Add LATENCYTOP support 2015-11-11 08:36:46 +01:00
sync-r4k.c MIPS: sync-r4k: reduce skew while synchronization 2016-01-24 01:31:51 +01:00
syscall.c
sysrq.c MIPS: Refactor dumping of TLB registers for r3k/r4k 2015-09-03 12:07:45 +02:00
time.c
topology.c
traps.c MIPS: traps: Fix SIGFPE information leak from `do_ov' and `do_trap_or_bp' 2016-03-04 22:52:32 +01:00
unaligned.c MIPS: Declare mips_debugfs_dir in a header 2015-10-26 09:49:42 +01:00
uprobes.c MIPS: Add uprobes support. 2015-09-03 12:08:05 +02:00
vdso.c MIPS: VDSO: Add implementations of gettimeofday() and clock_gettime() 2015-11-11 08:36:41 +01:00
vmlinux.lds.S Merge branch '4.3-fixes' into mips-for-linux-next 2015-11-12 11:36:03 +01:00
vpe-cmp.c
vpe-mt.c
vpe.c module: use a structure to encapsulate layout. 2015-12-04 22:46:25 +01:00
watch.c