Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

Pull MIPS fixes from Ralf Baechle:
 "Another round of 4.11 for the MIPS architecture. This time around it's
  mostly arch but little platforms-specific code.

   - PCI: Register controllers in the right order to aoid a PCI error
   - KGDB: Use kernel context for sleeping threads
   - smp-cps: Fix potentially uninitialised value of core
   - KASLR: Fix build
   - ELF: Fix BUG() warning in arch_check_elf
   - Fix modversioning of _mcount symbol
   - fix out-of-tree defconfig target builds
   - cevt-r4k: Fix out-of-bounds array access
   - perf: fix deadlock
   - Malta: Fix i8259 irqchip setup"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: PCI: add controllers before the specified head
  MIPS: KGDB: Use kernel context for sleeping threads
  MIPS: smp-cps: Fix potentially uninitialised value of core
  MIPS: KASLR: Add missing header files
  MIPS: Avoid BUG warning in arch_check_elf
  MIPS: Fix modversioning of _mcount symbol
  MIPS: generic: fix out-of-tree defconfig target builds
  MIPS: cevt-r4k: Fix out-of-bounds array access
  MIPS: perf: fix deadlock
  MIPS: Malta: Fix i8259 irqchip setup

Author: torvalds

arch/mips/Makefile

@@ -489,7 +489,7 @@ $(generic_defconfigs):
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 		-m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ \
 		$(foreach board,$(BOARDS),$(generic_config_dir)/board-$(board).config)
-	$(Q)$(MAKE) olddefconfig
+	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 
 #
 # Prevent generic merge_config rules attempting to merge single fragments
@@ -503,8 +503,8 @@ $(generic_config_dir)/%.config: ;
 #
 .PHONY: sead3_defconfig
 sead3_defconfig:
-	$(Q)$(MAKE) 32r2el_defconfig BOARDS=sead-3
+	$(Q)$(MAKE) -f $(srctree)/Makefile 32r2el_defconfig BOARDS=sead-3
 
 .PHONY: sead3micro_defconfig
 sead3micro_defconfig:
-	$(Q)$(MAKE) micro32r2el_defconfig BOARDS=sead-3
+	$(Q)$(MAKE) -f $(srctree)/Makefile micro32r2el_defconfig BOARDS=sead-3

arch/mips/include/asm/asm-prototypes.h

@@ -3,3 +3,4 @@
 #include <asm/fpu.h>
 #include <asm-generic/asm-prototypes.h>
 #include <asm/uaccess.h>
+#include <asm/ftrace.h>

arch/mips/kernel/cevt-r4k.c

@@ -80,7 +80,7 @@ static unsigned int calculate_min_delta(void)
 		}
 
 		/* Sorted insert of 75th percentile into buf2 */
-		for (k = 0; k < i; ++k) {
+		for (k = 0; k < i && k < ARRAY_SIZE(buf2); ++k) {
 			if (buf1[ARRAY_SIZE(buf1) - 1] < buf2[k]) {
 				l = min_t(unsigned int,
 					  i, ARRAY_SIZE(buf2) - 1);

arch/mips/kernel/elf.c

@@ -257,7 +257,7 @@ int arch_check_elf(void *_ehdr, bool has_interpreter, void *_interp_ehdr,
 	else if ((prog_req.fr1 && prog_req.frdefault) ||
 		 (prog_req.single && !prog_req.frdefault))
 		/* Make sure 64-bit MIPS III/IV/64R1 will not pick FR1 */
-		state->overall_fp_mode = ((current_cpu_data.fpu_id & MIPS_FPIR_F64) &&
+		state->overall_fp_mode = ((raw_current_cpu_data.fpu_id & MIPS_FPIR_F64) &&
 					  cpu_has_mips_r2_r6) ?
 					  FP_FR1 : FP_FR0;
 	else if (prog_req.fr1)

arch/mips/kernel/kgdb.c

@@ -244,35 +244,53 @@ static int compute_signal(int tt)
 void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
 {
 	int reg;
-	struct thread_info *ti = task_thread_info(p);
-	unsigned long ksp = (unsigned long)ti + THREAD_SIZE - 32;
-	struct pt_regs *regs = (struct pt_regs *)ksp - 1;
 #if (KGDB_GDB_REG_SIZE == 32)
 	u32 *ptr = (u32 *)gdb_regs;
 #else
 	u64 *ptr = (u64 *)gdb_regs;
 #endif
 
 	for (reg = 0; reg < 16; reg++)
-		*(ptr++) = regs->regs[reg];
+		*(ptr++) = 0;
 
 	/* S0 - S7 */
-	for (reg = 16; reg < 24; reg++)
-		*(ptr++) = regs->regs[reg];
+	*(ptr++) = p->thread.reg16;
+	*(ptr++) = p->thread.reg17;
+	*(ptr++) = p->thread.reg18;
+	*(ptr++) = p->thread.reg19;
+	*(ptr++) = p->thread.reg20;
+	*(ptr++) = p->thread.reg21;
+	*(ptr++) = p->thread.reg22;
+	*(ptr++) = p->thread.reg23;
 
 	for (reg = 24; reg < 28; reg++)
 		*(ptr++) = 0;
 
 	/* GP, SP, FP, RA */
-	for (reg = 28; reg < 32; reg++)
-		*(ptr++) = regs->regs[reg];
-
-	*(ptr++) = regs->cp0_status;
-	*(ptr++) = regs->lo;
-	*(ptr++) = regs->hi;
-	*(ptr++) = regs->cp0_badvaddr;
-	*(ptr++) = regs->cp0_cause;
-	*(ptr++) = regs->cp0_epc;
+	*(ptr++) = (long)p;
+	*(ptr++) = p->thread.reg29;
+	*(ptr++) = p->thread.reg30;
+	*(ptr++) = p->thread.reg31;
+
+	*(ptr++) = p->thread.cp0_status;
+
+	/* lo, hi */
+	*(ptr++) = 0;
+	*(ptr++) = 0;
+
+	/*
+	 * BadVAddr, Cause
+	 * Ideally these would come from the last exception frame up the stack
+	 * but that requires unwinding, otherwise we can't know much for sure.
+	 */
+	*(ptr++) = 0;
+	*(ptr++) = 0;
+
+	/*
+	 * PC
+	 * use return address (RA), i.e. the moment after return from resume()
+	 */
+	*(ptr++) = p->thread.reg31;
 }
 
 void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc)

arch/mips/kernel/perf_event_mipsxx.c

@@ -1446,6 +1446,11 @@ static int mipsxx_pmu_handle_shared_irq(void)
 	HANDLE_COUNTER(0)
 	}
 
+#ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
+	read_unlock(&pmuint_rwlock);
+#endif
+	resume_local_counters();
+
 	/*
 	 * Do all the work for the pending perf events. We can do this
 	 * in here because the performance counter interrupt is a regular
@@ -1454,10 +1459,6 @@ static int mipsxx_pmu_handle_shared_irq(void)
 	if (handled == IRQ_HANDLED)
 		irq_work_run();
 
-#ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
-	read_unlock(&pmuint_rwlock);
-#endif
-	resume_local_counters();
 	return handled;
 }
 

arch/mips/kernel/relocate.c

@@ -18,7 +18,7 @@
 #include <linux/kernel.h>
 #include <linux/libfdt.h>
 #include <linux/of_fdt.h>
-#include <linux/sched.h>
+#include <linux/sched/task.h>
 #include <linux/start_kernel.h>
 #include <linux/string.h>
 #include <linux/printk.h>

arch/mips/kernel/smp-cps.c

@@ -422,13 +422,12 @@ void play_dead(void)
 	local_irq_disable();
 	idle_task_exit();
 	cpu = smp_processor_id();
+	core = cpu_data[cpu].core;
 	cpu_death = CPU_DEATH_POWER;
 
 	pr_debug("CPU%d going offline\n", cpu);
 
 	if (cpu_has_mipsmt || cpu_has_vp) {
-		core = cpu_data[cpu].core;
-
 		/* Look for another online VPE within the core */
 		for_each_online_cpu(cpu_death_sibling) {
 			if (cpu_data[cpu_death_sibling].core != core)

arch/mips/mti-malta/malta-int.c

@@ -232,6 +232,17 @@ void __init arch_init_irq(void)
 {
 	int corehi_irq;
 
+	/*
+	 * Preallocate the i8259's expected virq's here. Since irqchip_init()
+	 * will probe the irqchips in hierarchial order, i8259 is probed last.
+	 * If anything allocates a virq before the i8259 is probed, it will
+	 * be given one of the i8259's expected range and consequently setup
+	 * of the i8259 will fail.
+	 */
+	WARN(irq_alloc_descs(I8259A_IRQ_BASE, I8259A_IRQ_BASE,
+			    16, numa_node_id()) < 0,
+		"Cannot reserve i8259 virqs at IRQ%d\n", I8259A_IRQ_BASE);
+
 	i8259_set_poll(mips_pcibios_iack);
 	irqchip_init();
 

arch/mips/pci/pci-legacy.c

@@ -190,7 +190,7 @@ void register_pci_controller(struct pci_controller *hose)
 	}
 
 	INIT_LIST_HEAD(&hose->list);
-	list_add(&hose->list, &controllers);
+	list_add_tail(&hose->list, &controllers);
 
 	/*
 	 * Do not panic here but later - this might happen before console init.