diff options
author | 2015-10-09 08:42:44 +0300 | |
---|---|---|
committer | 2015-10-09 08:52:35 +0300 | |
commit | fdb8b20906f3546ba6c2f9f0686d8a5189516ba3 (patch) | |
tree | 6bb43dc8a42d6e9403763bc749f706939dd2bc60 /kernel/arch/mips/kernel | |
parent | cc84a1f21026270463b580f2564f9d71912b20db (diff) |
Kernel bump from 4.1.3-rt to 4.1.7-rt.
These changes brings a vanilla kernel from kernel.org, and the patch
applied for rt is patch-4.1.7-rt8.patch. No further changes needed.
Change-Id: Id8dd03c2ddd971e4d1d69b905f3069737053b700
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/mips/kernel')
-rw-r--r-- | kernel/arch/mips/kernel/mips-mt-fpaff.c | 5 | ||||
-rw-r--r-- | kernel/arch/mips/kernel/relocate_kernel.S | 8 | ||||
-rw-r--r-- | kernel/arch/mips/kernel/scall64-64.S | 2 | ||||
-rw-r--r-- | kernel/arch/mips/kernel/scall64-n32.S | 2 | ||||
-rw-r--r-- | kernel/arch/mips/kernel/signal32.c | 2 | ||||
-rw-r--r-- | kernel/arch/mips/kernel/smp.c | 44 | ||||
-rw-r--r-- | kernel/arch/mips/kernel/traps.c | 13 | ||||
-rw-r--r-- | kernel/arch/mips/kernel/unaligned.c | 2 |
8 files changed, 66 insertions, 12 deletions
diff --git a/kernel/arch/mips/kernel/mips-mt-fpaff.c b/kernel/arch/mips/kernel/mips-mt-fpaff.c index 3e4491aa6..789d7bf4f 100644 --- a/kernel/arch/mips/kernel/mips-mt-fpaff.c +++ b/kernel/arch/mips/kernel/mips-mt-fpaff.c @@ -154,7 +154,7 @@ asmlinkage long mipsmt_sys_sched_getaffinity(pid_t pid, unsigned int len, unsigned long __user *user_mask_ptr) { unsigned int real_len; - cpumask_t mask; + cpumask_t allowed, mask; int retval; struct task_struct *p; @@ -173,7 +173,8 @@ asmlinkage long mipsmt_sys_sched_getaffinity(pid_t pid, unsigned int len, if (retval) goto out_unlock; - cpumask_and(&mask, &p->thread.user_cpus_allowed, cpu_possible_mask); + cpumask_or(&allowed, &p->thread.user_cpus_allowed, &p->cpus_allowed); + cpumask_and(&mask, &allowed, cpu_active_mask); out_unlock: read_unlock(&tasklist_lock); diff --git a/kernel/arch/mips/kernel/relocate_kernel.S b/kernel/arch/mips/kernel/relocate_kernel.S index 74bab9ddd..c6bbf2165 100644 --- a/kernel/arch/mips/kernel/relocate_kernel.S +++ b/kernel/arch/mips/kernel/relocate_kernel.S @@ -24,7 +24,7 @@ LEAF(relocate_new_kernel) process_entry: PTR_L s2, (s0) - PTR_ADD s0, s0, SZREG + PTR_ADDIU s0, s0, SZREG /* * In case of a kdump/crash kernel, the indirection page is not @@ -61,9 +61,9 @@ copy_word: /* copy page word by word */ REG_L s5, (s2) REG_S s5, (s4) - PTR_ADD s4, s4, SZREG - PTR_ADD s2, s2, SZREG - LONG_SUB s6, s6, 1 + PTR_ADDIU s4, s4, SZREG + PTR_ADDIU s2, s2, SZREG + LONG_ADDIU s6, s6, -1 beq s6, zero, process_entry b copy_word b process_entry diff --git a/kernel/arch/mips/kernel/scall64-64.S b/kernel/arch/mips/kernel/scall64-64.S index ad4d44635..a6f6b762c 100644 --- a/kernel/arch/mips/kernel/scall64-64.S +++ b/kernel/arch/mips/kernel/scall64-64.S @@ -80,7 +80,7 @@ syscall_trace_entry: SAVE_STATIC move s0, t2 move a0, sp - daddiu a1, v0, __NR_64_Linux + move a1, v0 jal syscall_trace_enter bltz v0, 2f # seccomp failed? Skip syscall diff --git a/kernel/arch/mips/kernel/scall64-n32.S b/kernel/arch/mips/kernel/scall64-n32.S index 446cc654d..4b2010654 100644 --- a/kernel/arch/mips/kernel/scall64-n32.S +++ b/kernel/arch/mips/kernel/scall64-n32.S @@ -72,7 +72,7 @@ n32_syscall_trace_entry: SAVE_STATIC move s0, t2 move a0, sp - daddiu a1, v0, __NR_N32_Linux + move a1, v0 jal syscall_trace_enter bltz v0, 2f # seccomp failed? Skip syscall diff --git a/kernel/arch/mips/kernel/signal32.c b/kernel/arch/mips/kernel/signal32.c index 19a7705f2..5d7f26349 100644 --- a/kernel/arch/mips/kernel/signal32.c +++ b/kernel/arch/mips/kernel/signal32.c @@ -409,8 +409,6 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from) int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) { - memset(to, 0, sizeof *to); - if (copy_from_user(to, from, 3*sizeof(int)) || copy_from_user(to->_sifields._pad, from->_sifields._pad, SI_PAD_SIZE32)) diff --git a/kernel/arch/mips/kernel/smp.c b/kernel/arch/mips/kernel/smp.c index faa46ebd9..d0744cc77 100644 --- a/kernel/arch/mips/kernel/smp.c +++ b/kernel/arch/mips/kernel/smp.c @@ -63,6 +63,13 @@ EXPORT_SYMBOL(cpu_sibling_map); cpumask_t cpu_core_map[NR_CPUS] __read_mostly; EXPORT_SYMBOL(cpu_core_map); +/* + * A logcal cpu mask containing only one VPE per core to + * reduce the number of IPIs on large MT systems. + */ +cpumask_t cpu_foreign_map __read_mostly; +EXPORT_SYMBOL(cpu_foreign_map); + /* representing cpus for which sibling maps can be computed */ static cpumask_t cpu_sibling_setup_map; @@ -103,6 +110,29 @@ static inline void set_cpu_core_map(int cpu) } } +/* + * Calculate a new cpu_foreign_map mask whenever a + * new cpu appears or disappears. + */ +static inline void calculate_cpu_foreign_map(void) +{ + int i, k, core_present; + cpumask_t temp_foreign_map; + + /* Re-calculate the mask */ + for_each_online_cpu(i) { + core_present = 0; + for_each_cpu(k, &temp_foreign_map) + if (cpu_data[i].package == cpu_data[k].package && + cpu_data[i].core == cpu_data[k].core) + core_present = 1; + if (!core_present) + cpumask_set_cpu(i, &temp_foreign_map); + } + + cpumask_copy(&cpu_foreign_map, &temp_foreign_map); +} + struct plat_smp_ops *mp_ops; EXPORT_SYMBOL(mp_ops); @@ -146,6 +176,8 @@ asmlinkage void start_secondary(void) set_cpu_sibling_map(cpu); set_cpu_core_map(cpu); + calculate_cpu_foreign_map(); + cpumask_set_cpu(cpu, &cpu_callin_map); synchronise_count_slave(cpu); @@ -173,9 +205,18 @@ void __irq_entry smp_call_function_interrupt(void) static void stop_this_cpu(void *dummy) { /* - * Remove this CPU: + * Remove this CPU. Be a bit slow here and + * set the bits for every online CPU so we don't miss + * any IPI whilst taking this VPE down. */ + + cpumask_copy(&cpu_foreign_map, cpu_online_mask); + + /* Make it visible to every other CPU */ + smp_mb(); + set_cpu_online(smp_processor_id(), false); + calculate_cpu_foreign_map(); local_irq_disable(); while (1); } @@ -197,6 +238,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus) mp_ops->prepare_cpus(max_cpus); set_cpu_sibling_map(0); set_cpu_core_map(0); + calculate_cpu_foreign_map(); #ifndef CONFIG_HOTPLUG_CPU init_cpu_present(cpu_possible_mask); #endif diff --git a/kernel/arch/mips/kernel/traps.c b/kernel/arch/mips/kernel/traps.c index d2d1c1933..5f5f44edc 100644 --- a/kernel/arch/mips/kernel/traps.c +++ b/kernel/arch/mips/kernel/traps.c @@ -192,6 +192,7 @@ static void show_stacktrace(struct task_struct *task, void show_stack(struct task_struct *task, unsigned long *sp) { struct pt_regs regs; + mm_segment_t old_fs = get_fs(); if (sp) { regs.regs[29] = (unsigned long)sp; regs.regs[31] = 0; @@ -210,7 +211,13 @@ void show_stack(struct task_struct *task, unsigned long *sp) prepare_frametrace(®s); } } + /* + * show_stack() deals exclusively with kernel mode, so be sure to access + * the stack in the kernel (not user) address space. + */ + set_fs(KERNEL_DS); show_stacktrace(task, ®s); + set_fs(old_fs); } static void show_code(unsigned int __user *pc) @@ -1518,6 +1525,7 @@ asmlinkage void do_mcheck(struct pt_regs *regs) const int field = 2 * sizeof(unsigned long); int multi_match = regs->cp0_status & ST0_TS; enum ctx_state prev_state; + mm_segment_t old_fs = get_fs(); prev_state = exception_enter(); show_regs(regs); @@ -1539,8 +1547,13 @@ asmlinkage void do_mcheck(struct pt_regs *regs) dump_tlb_all(); } + if (!user_mode(regs)) + set_fs(KERNEL_DS); + show_code((unsigned int __user *) regs->cp0_epc); + set_fs(old_fs); + /* * Some chips may have other causes of machine check (e.g. SB1 * graduation timer) diff --git a/kernel/arch/mips/kernel/unaligned.c b/kernel/arch/mips/kernel/unaligned.c index af84bef0c..eb3efd137 100644 --- a/kernel/arch/mips/kernel/unaligned.c +++ b/kernel/arch/mips/kernel/unaligned.c @@ -438,7 +438,7 @@ do { \ : "memory"); \ } while(0) -#define StoreDW(addr, value, res) \ +#define _StoreDW(addr, value, res) \ do { \ __asm__ __volatile__ ( \ ".set\tpush\n\t" \ |