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

Pull MIPS fixes from Ralf Baechle:
 "A round of 4.8 fixes:

  MIPS generic code:
   - Add a missing ".set pop" in an early commit
   - Fix memory regions reaching top of physical
   - MAAR: Fix address alignment
   - vDSO: Fix Malta EVA mapping to vDSO page structs
   - uprobes: fix incorrect uprobe brk handling
   - uprobes: select HAVE_REGS_AND_STACK_ACCESS_API
   - Avoid a BUG warning during PR_SET_FP_MODE prctl
   - SMP: Fix possibility of deadlock when bringing CPUs online
   - R6: Remove compact branch policy Kconfig entries
   - Fix size calc when avoiding IPIs for small icache flushes
   - Fix pre-r6 emulation FPU initialisation
   - Fix delay slot emulation count in debugfs

  ATH79:
   - Fix test for error return of clk_register_fixed_factor.

  Octeon:
   - Fix kernel header to work for VDSO build.
   - Fix initialization of platform device probing.

  paravirt:
   - Fix undefined reference to smp_bootstrap"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: Fix delay slot emulation count in debugfs
  MIPS: SMP: Fix possibility of deadlock when bringing CPUs online
  MIPS: Fix pre-r6 emulation FPU initialisation
  MIPS: vDSO: Fix Malta EVA mapping to vDSO page structs
  MIPS: Select HAVE_REGS_AND_STACK_ACCESS_API
  MIPS: Octeon: Fix platform bus probing
  MIPS: Octeon: mangle-port: fix build failure with VDSO code
  MIPS: Avoid a BUG warning during prctl(PR_SET_FP_MODE, ...)
  MIPS: c-r4k: Fix size calc when avoiding IPIs for small icache flushes
  MIPS: Add a missing ".set pop" in an early commit
  MIPS: paravirt: Fix undefined reference to smp_bootstrap
  MIPS: Remove compact branch policy Kconfig entries
  MIPS: MAAR: Fix address alignment
  MIPS: Fix memory regions reaching top of physical
  MIPS: uprobes: fix incorrect uprobe brk handling
  MIPS: ath79: Fix test for error return of clk_register_fixed_factor().

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 2638856..212ff92 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -65,6 +65,7 @@ config MIPS
        select ARCH_CLOCKSOURCE_DATA
        select HANDLE_DOMAIN_IRQ
        select HAVE_EXIT_THREAD
+       select HAVE_REGS_AND_STACK_ACCESS_API
 
 menu "Machine selection"
 

diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
index f0e314c..7f975b2 100644 (file)
--- a/arch/mips/Kconfig.debug
+++ b/arch/mips/Kconfig.debug
@@ -113,42 +113,6 @@ config SPINLOCK_TEST
        help
          Add several files to the debugfs to test spinlock speed.
 
-if CPU_MIPSR6
-
-choice
-       prompt "Compact branch policy"
-       default MIPS_COMPACT_BRANCHES_OPTIMAL
-
-config MIPS_COMPACT_BRANCHES_NEVER
-       bool "Never (force delay slot branches)"
-       help
-         Pass the -mcompact-branches=never flag to the compiler in order to
-         force it to always emit branches with delay slots, and make no use
-         of the compact branch instructions introduced by MIPSr6. This is
-         useful if you suspect there may be an issue with compact branches in
-         either the compiler or the CPU.
-
-config MIPS_COMPACT_BRANCHES_OPTIMAL
-       bool "Optimal (use where beneficial)"
-       help
-         Pass the -mcompact-branches=optimal flag to the compiler in order for
-         it to make use of compact branch instructions where it deems them
-         beneficial, and use branches with delay slots elsewhere. This is the
-         default compiler behaviour, and should be used unless you have a
-         reason to choose otherwise.
-
-config MIPS_COMPACT_BRANCHES_ALWAYS
-       bool "Always (force compact branches)"
-       help
-         Pass the -mcompact-branches=always flag to the compiler in order to
-         force it to always emit compact branches, making no use of branch
-         instructions with delay slots. This can result in more compact code
-         which may be beneficial in some scenarios.
-
-endchoice
-
-endif # CPU_MIPSR6
-
 config SCACHE_DEBUGFS
        bool "L2 cache debugfs entries"
        depends on DEBUG_FS

diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index efd7a9d..598ab29 100644 (file)
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -203,10 +203,6 @@ endif
 toolchain-virt                         := $(call cc-option-yn,$(mips-cflags) -mvirt)
 cflags-$(toolchain-virt)               += -DTOOLCHAIN_SUPPORTS_VIRT
 
-cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_NEVER)   += -mcompact-branches=never
-cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_OPTIMAL) += -mcompact-branches=optimal
-cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_ALWAYS)  += -mcompact-branches=always
-
 #
 # Firmware support
 #

diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c
index 2e73784..cc3a1e3 100644 (file)
--- a/arch/mips/ath79/clock.c
+++ b/arch/mips/ath79/clock.c
@@ -96,7 +96,7 @@ static struct clk * __init ath79_reg_ffclk(const char *name,
        struct clk *clk;
 
        clk = clk_register_fixed_factor(NULL, name, parent_name, 0, mult, div);
-       if (!clk)
+       if (IS_ERR(clk))
                panic("failed to allocate %s clock structure", name);
 
        return clk;

diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index b31fbc9..37a932d 100644 (file)
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -1059,7 +1059,7 @@ static int __init octeon_publish_devices(void)
 {
        return of_platform_bus_probe(NULL, octeon_ids, NULL);
 }
-device_initcall(octeon_publish_devices);
+arch_initcall(octeon_publish_devices);
 
 MODULE_AUTHOR("David Daney <ddaney@caviumnetworks.com>");
 MODULE_LICENSE("GPL");

diff --git a/arch/mips/include/asm/asmmacro.h b/arch/mips/include/asm/asmmacro.h
index 56584a6..83054f7 100644 (file)
--- a/arch/mips/include/asm/asmmacro.h
+++ b/arch/mips/include/asm/asmmacro.h
@@ -157,6 +157,7 @@
        ldc1    $f28, THREAD_FPR28(\thread)
        ldc1    $f30, THREAD_FPR30(\thread)
        ctc1    \tmp, fcr31
+       .set    pop
        .endm
 
        .macro  fpu_restore_16odd thread

diff --git a/arch/mips/include/asm/mach-cavium-octeon/mangle-port.h b/arch/mips/include/asm/mach-cavium-octeon/mangle-port.h
index 0cf5ac1..8ff2cbd 100644 (file)
--- a/arch/mips/include/asm/mach-cavium-octeon/mangle-port.h
+++ b/arch/mips/include/asm/mach-cavium-octeon/mangle-port.h
@@ -15,8 +15,8 @@
 static inline bool __should_swizzle_bits(volatile void *a)
 {
        extern const bool octeon_should_swizzle_table[];
+       u64 did = ((u64)(uintptr_t)a >> 40) & 0xff;
 
-       unsigned long did = ((unsigned long)a >> 40) & 0xff;
        return octeon_should_swizzle_table[did];
 }
 
@@ -29,7 +29,7 @@ static inline bool __should_swizzle_bits(volatile void *a)
 
 #define __should_swizzle_bits(a)       false
 
-static inline bool __should_swizzle_addr(unsigned long p)
+static inline bool __should_swizzle_addr(u64 p)
 {
        /* boot bus? */
        return ((p >> 40) & 0xff) == 0;

diff --git a/arch/mips/include/asm/mach-paravirt/kernel-entry-init.h b/arch/mips/include/asm/mach-paravirt/kernel-entry-init.h
index 2f82bfa..c9f5769 100644 (file)
--- a/arch/mips/include/asm/mach-paravirt/kernel-entry-init.h
+++ b/arch/mips/include/asm/mach-paravirt/kernel-entry-init.h
@@ -11,11 +11,13 @@
 #define CP0_EBASE $15, 1
 
        .macro  kernel_entry_setup
+#ifdef CONFIG_SMP
        mfc0    t0, CP0_EBASE
        andi    t0, t0, 0x3ff           # CPUNum
        beqz    t0, 1f
        # CPUs other than zero goto smp_bootstrap
        j       smp_bootstrap
+#endif /* CONFIG_SMP */
 
 1:
        .endm

diff --git a/arch/mips/kernel/mips-r2-to-r6-emul.c b/arch/mips/kernel/mips-r2-to-r6-emul.c
index c3372ca..0a7e10b 100644 (file)
--- a/arch/mips/kernel/mips-r2-to-r6-emul.c
+++ b/arch/mips/kernel/mips-r2-to-r6-emul.c
@@ -1164,7 +1164,9 @@ fpu_emul:
                regs->regs[31] = r31;
                regs->cp0_epc = epc;
                if (!used_math()) {     /* First time FPU user.  */
+                       preempt_disable();
                        err = init_fpu();
+                       preempt_enable();
                        set_used_math();
                }
                lose_fpu(1);    /* Save FPU state for the emulator. */

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 7429ad0..d2d0615 100644 (file)
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -605,14 +605,14 @@ int mips_set_process_fp_mode(struct task_struct *task, unsigned int value)
                return -EOPNOTSUPP;
 
        /* Avoid inadvertently triggering emulation */
-       if ((value & PR_FP_MODE_FR) && cpu_has_fpu &&
-           !(current_cpu_data.fpu_id & MIPS_FPIR_F64))
+       if ((value & PR_FP_MODE_FR) && raw_cpu_has_fpu &&
+           !(raw_current_cpu_data.fpu_id & MIPS_FPIR_F64))
                return -EOPNOTSUPP;
-       if ((value & PR_FP_MODE_FRE) && cpu_has_fpu && !cpu_has_fre)
+       if ((value & PR_FP_MODE_FRE) && raw_cpu_has_fpu && !cpu_has_fre)
                return -EOPNOTSUPP;
 
        /* FR = 0 not supported in MIPS R6 */
-       if (!(value & PR_FP_MODE_FR) && cpu_has_fpu && cpu_has_mips_r6)
+       if (!(value & PR_FP_MODE_FR) && raw_cpu_has_fpu && cpu_has_mips_r6)
                return -EOPNOTSUPP;
 
        /* Proceed with the mode switch */

diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 36cf8d6..3be0e6b 100644 (file)
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -87,6 +87,13 @@ void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type)
        int x = boot_mem_map.nr_map;
        int i;
 
+       /*
+        * If the region reaches the top of the physical address space, adjust
+        * the size slightly so that (start + size) doesn't overflow
+        */
+       if (start + size - 1 == (phys_addr_t)ULLONG_MAX)
+               --size;
+
        /* Sanity check */
        if (start + size < start) {
                pr_warn("Trying to add an invalid memory region, skipped\n");

diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index f95f094..b0baf48 100644 (file)
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -322,6 +322,9 @@ asmlinkage void start_secondary(void)
        cpumask_set_cpu(cpu, &cpu_coherent_mask);
        notify_cpu_starting(cpu);
 
+       cpumask_set_cpu(cpu, &cpu_callin_map);
+       synchronise_count_slave(cpu);
+
        set_cpu_online(cpu, true);
 
        set_cpu_sibling_map(cpu);
@@ -329,10 +332,6 @@ asmlinkage void start_secondary(void)
 
        calculate_cpu_foreign_map();
 
-       cpumask_set_cpu(cpu, &cpu_callin_map);
-
-       synchronise_count_slave(cpu);
-
        /*
         * irq will be enabled in ->smp_finish(), enabling it too early
         * is dangerous.

diff --git a/arch/mips/kernel/uprobes.c b/arch/mips/kernel/uprobes.c
index 8452d93..1149b30 100644 (file)
--- a/arch/mips/kernel/uprobes.c
+++ b/arch/mips/kernel/uprobes.c
@@ -222,7 +222,7 @@ int arch_uprobe_exception_notify(struct notifier_block *self,
                return NOTIFY_DONE;
 
        switch (val) {
-       case DIE_BREAK:
+       case DIE_UPROBE:
                if (uprobe_pre_sstep_notifier(regs))
                        return NOTIFY_STOP;
                break;

diff --git a/arch/mips/kernel/vdso.c b/arch/mips/kernel/vdso.c
index 9abe447..f9dbfb1 100644 (file)
--- a/arch/mips/kernel/vdso.c
+++ b/arch/mips/kernel/vdso.c
@@ -39,16 +39,16 @@ static struct vm_special_mapping vdso_vvar_mapping = {
 static void __init init_vdso_image(struct mips_vdso_image *image)
 {
        unsigned long num_pages, i;
+       unsigned long data_pfn;
 
        BUG_ON(!PAGE_ALIGNED(image->data));
        BUG_ON(!PAGE_ALIGNED(image->size));
 
        num_pages = image->size / PAGE_SIZE;
 
-       for (i = 0; i < num_pages; i++) {
-               image->mapping.pages[i] =
-                       virt_to_page(image->data + (i * PAGE_SIZE));
-       }
+       data_pfn = __phys_to_pfn(__pa_symbol(image->data));
+       for (i = 0; i < num_pages; i++)
+               image->mapping.pages[i] = pfn_to_page(data_pfn + i);
 }
 
 static int __init init_vdso(void)

diff --git a/arch/mips/math-emu/dsemul.c b/arch/mips/math-emu/dsemul.c
index 72a4642..4a094f7 100644 (file)
--- a/arch/mips/math-emu/dsemul.c
+++ b/arch/mips/math-emu/dsemul.c
@@ -298,5 +298,6 @@ bool do_dsemulret(struct pt_regs *xcp)
        /* Set EPC to return to post-branch instruction */
        xcp->cp0_epc = current->thread.bd_emu_cont_pc;
        pr_debug("dsemulret to 0x%08lx\n", xcp->cp0_epc);
+       MIPS_FPU_EMU_INC_STATS(ds_emul);
        return true;
 }

diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index cd72805..fa7d8d3 100644 (file)
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -800,7 +800,7 @@ static void r4k_flush_icache_range(unsigned long start, unsigned long end)
                 * If address-based cache ops don't require an SMP call, then
                 * use them exclusively for small flushes.
                 */
-               size = start - end;
+               size = end - start;
                cache_size = icache_size;
                if (!cpu_has_ic_fills_f_dc) {
                        size *= 2;

diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index a5509e7..2c3749d 100644 (file)
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -261,7 +261,6 @@ unsigned __weak platform_maar_init(unsigned num_pairs)
 {
        struct maar_config cfg[BOOT_MEM_MAP_MAX];
        unsigned i, num_configured, num_cfg = 0;
-       phys_addr_t skip;
 
        for (i = 0; i < boot_mem_map.nr_map; i++) {
                switch (boot_mem_map.map[i].type) {
@@ -272,14 +271,14 @@ unsigned __weak platform_maar_init(unsigned num_pairs)
                        continue;
                }
 
-               skip = 0x10000 - (boot_mem_map.map[i].addr & 0xffff);
-
+               /* Round lower up */
                cfg[num_cfg].lower = boot_mem_map.map[i].addr;
-               cfg[num_cfg].lower += skip;
+               cfg[num_cfg].lower = (cfg[num_cfg].lower + 0xffff) & ~0xffff;
 
-               cfg[num_cfg].upper = cfg[num_cfg].lower;
-               cfg[num_cfg].upper += boot_mem_map.map[i].size - 1;
-               cfg[num_cfg].upper -= skip;
+               /* Round upper down */
+               cfg[num_cfg].upper = boot_mem_map.map[i].addr +
+                                       boot_mem_map.map[i].size;
+               cfg[num_cfg].upper = (cfg[num_cfg].upper & ~0xffff) - 1;
 
                cfg[num_cfg].attrs = MIPS_MAAR_S;
                num_cfg++;