Merge branch 'next-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc into test

Merge miscellaneous bits from benh. Fix a minor conflict with
OpalMessageType changing names to opal_msg_type.

10 files changed, 54 insertions, 145 deletions

diff --git a/arch/powerpc/include/asm/cache.h b/arch/powerpc/include/asm/cache.h
index 34a05a1a990b..0dc42c5082b7 100644
--- a/arch/powerpc/include/asm/cache.h
+++ b/arch/powerpc/include/asm/cache.h
@@ -76,9 +76,6 @@ extern void _set_L3CR(unsigned long);
 #define _set_L3CR(val)  do { } while(0)
 #endif
 
-extern void cacheable_memzero(void *p, unsigned int nb);
-extern void *cacheable_memcpy(void *, const void *, unsigned int);
-
 #endif /* !__ASSEMBLY__ */
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_CACHE_H */
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index 0ef0fd660ac6..c08de77f398a 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -210,6 +210,8 @@ extern int opal_notifier_unregister(struct notifier_block *nb);
 
 extern int opal_message_notifier_register(enum opal_msg_type msg_type,
                                                 struct notifier_block *nb);
+extern int opal_message_notifier_unregister(enum opal_msg_type msg_type,
+                                            struct notifier_block *nb);
 extern void opal_notifier_enable(void);
 extern void opal_notifier_disable(void);
 extern void opal_notifier_update_evt(uint64_t evt_mask, uint64_t evt_val);
diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
index 55f19f9fd708..6813f80d1eec 100644
--- a/arch/powerpc/lib/copy_32.S
+++ b/arch/powerpc/lib/copy_32.S
@@ -69,54 +69,6 @@ CACHELINE_BYTES = L1_CACHE_BYTES
 LG_CACHELINE_BYTES = L1_CACHE_SHIFT
 CACHELINE_MASK = (L1_CACHE_BYTES-1)
 
-/*
- * Use dcbz on the complete cache lines in the destination
- * to set them to zero.  This requires that the destination
- * area is cacheable.  -- paulus
- */
-_GLOBAL(cacheable_memzero)
-        mr      r5,r4
-        li      r4,0
-        addi    r6,r3,-4
-        cmplwi  0,r5,4
-        blt     7f
-        stwu    r4,4(r6)
-        beqlr
-        andi.   r0,r6,3
-        add     r5,r0,r5
-        subf    r6,r0,r6
-        clrlwi  r7,r6,32-LG_CACHELINE_BYTES
-        add     r8,r7,r5
-        srwi    r9,r8,LG_CACHELINE_BYTES
-        addic.  r9,r9,-1        /* total number of complete cachelines */
-        ble     2f
-        xori    r0,r7,CACHELINE_MASK & ~3
-        srwi.   r0,r0,2
-        beq     3f
-        mtctr   r0
-4:      stwu    r4,4(r6)
-        bdnz    4b
-3:      mtctr   r9
-        li      r7,4
-10:     dcbz    r7,r6
-        addi    r6,r6,CACHELINE_BYTES
-        bdnz    10b
-        clrlwi  r5,r8,32-LG_CACHELINE_BYTES
-        addi    r5,r5,4
-2:      srwi    r0,r5,2
-        mtctr   r0
-        bdz     6f
-1:      stwu    r4,4(r6)
-        bdnz    1b
-6:      andi.   r5,r5,3
-7:      cmpwi   0,r5,0
-        beqlr
-        mtctr   r5
-        addi    r6,r6,3
-8:      stbu    r4,1(r6)
-        bdnz    8b
-        blr
-
 _GLOBAL(memset)
         rlwimi  r4,r4,8,16,23
         rlwimi  r4,r4,16,0,15
@@ -142,85 +94,6 @@ _GLOBAL(memset)
         bdnz    8b
         blr
 
-/*
- * This version uses dcbz on the complete cache lines in the
- * destination area to reduce memory traffic.  This requires that
- * the destination area is cacheable.
- * We only use this version if the source and dest don't overlap.
- * -- paulus.
- */
-_GLOBAL(cacheable_memcpy)
-        add     r7,r3,r5                /* test if the src & dst overlap */
-        add     r8,r4,r5
-        cmplw   0,r4,r7
-        cmplw   1,r3,r8
-        crand   0,0,4                   /* cr0.lt &= cr1.lt */
-        blt     memcpy                  /* if regions overlap */
-
-        addi    r4,r4,-4
-        addi    r6,r3,-4
-        neg     r0,r3
-        andi.   r0,r0,CACHELINE_MASK    /* # bytes to start of cache line */
-        beq     58f
-
-        cmplw   0,r5,r0                 /* is this more than total to do? */
-        blt     63f                     /* if not much to do */
-        andi.   r8,r0,3                 /* get it word-aligned first */
-        subf    r5,r0,r5
-        mtctr   r8
-        beq+    61f
-70:     lbz     r9,4(r4)                /* do some bytes */
-        stb     r9,4(r6)
-        addi    r4,r4,1
-        addi    r6,r6,1
-        bdnz    70b
-61:     srwi.   r0,r0,2
-        mtctr   r0
-        beq     58f
-72:     lwzu    r9,4(r4)                /* do some words */
-        stwu    r9,4(r6)
-        bdnz    72b
-
-58:     srwi.   r0,r5,LG_CACHELINE_BYTES /* # complete cachelines */
-        clrlwi  r5,r5,32-LG_CACHELINE_BYTES
-        li      r11,4
-        mtctr   r0
-        beq     63f
-53:
-        dcbz    r11,r6
-        COPY_16_BYTES
-#if L1_CACHE_BYTES >= 32
-        COPY_16_BYTES
-#if L1_CACHE_BYTES >= 64
-        COPY_16_BYTES
-        COPY_16_BYTES
-#if L1_CACHE_BYTES >= 128
-        COPY_16_BYTES
-        COPY_16_BYTES
-        COPY_16_BYTES
-        COPY_16_BYTES
-#endif
-#endif
-#endif
-        bdnz    53b
-
-63:     srwi.   r0,r5,2
-        mtctr   r0
-        beq     64f
-30:     lwzu    r0,4(r4)
-        stwu    r0,4(r6)
-        bdnz    30b
-
-64:     andi.   r0,r5,3
-        mtctr   r0
-        beq+    65f
-40:     lbz     r0,4(r4)
-        stb     r0,4(r6)
-        addi    r4,r4,1
-        addi    r6,r6,1
-        bdnz    40b
-65:     blr
-
 _GLOBAL(memmove)
         cmplw   0,r3,r4
         bgt     backwards_memcpy
diff --git a/arch/powerpc/lib/locks.c b/arch/powerpc/lib/locks.c
index 170a0346f756..f7deebdf3365 100644
--- a/arch/powerpc/lib/locks.c
+++ b/arch/powerpc/lib/locks.c
@@ -41,6 +41,7 @@ void __spin_yield(arch_spinlock_t *lock)
         plpar_hcall_norets(H_CONFER,
                 get_hard_smp_processor_id(holder_cpu), yield_count);
 }
+EXPORT_SYMBOL_GPL(__spin_yield);
 
 /*
  * Waiting for a read lock or a write lock on a rwlock...
diff --git a/arch/powerpc/lib/ppc_ksyms.c b/arch/powerpc/lib/ppc_ksyms.c
index f993959647b5..c7f8e9586316 100644
--- a/arch/powerpc/lib/ppc_ksyms.c
+++ b/arch/powerpc/lib/ppc_ksyms.c
@@ -8,10 +8,6 @@ EXPORT_SYMBOL(memset);
 EXPORT_SYMBOL(memmove);
 EXPORT_SYMBOL(memcmp);
 EXPORT_SYMBOL(memchr);
-#ifdef CONFIG_PPC32
-EXPORT_SYMBOL(cacheable_memcpy);
-EXPORT_SYMBOL(cacheable_memzero);
-#endif
 
 EXPORT_SYMBOL(strcpy);
 EXPORT_SYMBOL(strncpy);
diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c
index 5029dc19b517..eb0e489b1bb7 100644
--- a/arch/powerpc/mm/ppc_mmu_32.c
+++ b/arch/powerpc/mm/ppc_mmu_32.c
@@ -224,7 +224,7 @@ void __init MMU_init_hw(void)
          */
         if ( ppc_md.progress ) ppc_md.progress("hash:find piece", 0x322);
         Hash = __va(memblock_alloc(Hash_size, Hash_size));
-        cacheable_memzero(Hash, Hash_size);
+        memset(Hash, 0, Hash_size);
         _SDR1 = __pa(Hash) | SDR1_LOW_BITS;
 
         Hash_end = (struct hash_pte *) ((unsigned long)Hash + Hash_size);
diff --git a/arch/powerpc/platforms/powermac/bootx_init.c b/arch/powerpc/platforms/powermac/bootx_init.c
index 3e91ef538114..76f5013c35e5 100644
--- a/arch/powerpc/platforms/powermac/bootx_init.c
+++ b/arch/powerpc/platforms/powermac/bootx_init.c
@@ -246,7 +246,7 @@ static void __init bootx_scan_dt_build_strings(unsigned long base,
                 DBG(" detected display ! adding properties names !\n");
                 bootx_dt_add_string("linux,boot-display", mem_end);
                 bootx_dt_add_string("linux,opened", mem_end);
-                strncpy(bootx_disp_path, namep, 255);
+                strlcpy(bootx_disp_path, namep, sizeof(bootx_disp_path));
         }
 
         /* get and store all property names */
diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
index 4c24bf60d39d..59cfc9d63c2d 100644
--- a/arch/powerpc/platforms/powermac/pic.c
+++ b/arch/powerpc/platforms/powermac/pic.c
@@ -321,6 +321,9 @@ static void __init pmac_pic_probe_oldstyle(void)
                 max_irqs = max_real_irqs = 64;
 
                 /* We might have a second cascaded heathrow */
+
+                /* Compensate for of_node_put() in of_find_node_by_name() */
+                of_node_get(master);
                 slave = of_find_node_by_name(master, "mac-io");
 
                 /* Check ordering of master & slave */
diff --git a/arch/powerpc/platforms/powernv/opal-flash.c b/arch/powerpc/platforms/powernv/opal-flash.c
index 5c21d9c07f45..0ff07ff891f0 100644
--- a/arch/powerpc/platforms/powernv/opal-flash.c
+++ b/arch/powerpc/platforms/powernv/opal-flash.c
@@ -120,7 +120,11 @@ static struct image_header_t	image_header;
 static struct image_data_t      image_data;
 static struct validate_flash_t  validate_flash_data;
 static struct manage_flash_t    manage_flash_data;
-static struct update_flash_t    update_flash_data;
+
+/* Initialize update_flash_data status to No Operation */
+static struct update_flash_t    update_flash_data = {
+        .status = FLASH_NO_OP,
+};
 
 static DEFINE_MUTEX(image_data_mutex);
 
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 142a08a61bd1..d403b2b08626 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -23,6 +23,8 @@
 #include <linux/kobject.h>
 #include <linux/delay.h>
 #include <linux/memblock.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
 
 #include <asm/machdep.h>
 #include <asm/opal.h>
@@ -58,6 +60,7 @@ static struct atomic_notifier_head opal_msg_notifier_head[OPAL_MSG_TYPE_MAX];
 static DEFINE_SPINLOCK(opal_notifier_lock);
 static uint64_t last_notified_mask = 0x0ul;
 static atomic_t opal_notifier_hold = ATOMIC_INIT(0);
+static uint32_t opal_heartbeat;
 
 static void opal_reinit_cores(void)
 {
@@ -305,20 +308,23 @@ void opal_notifier_disable(void)
 int opal_message_notifier_register(enum opal_msg_type msg_type,
                                         struct notifier_block *nb)
 {
-        if (!nb) {
-                pr_warning("%s: Invalid argument (%p)\n",
-                           __func__, nb);
-                return -EINVAL;
-        }
-        if (msg_type > OPAL_MSG_TYPE_MAX) {
-                pr_warning("%s: Invalid message type argument (%d)\n",
+        if (!nb || msg_type >= OPAL_MSG_TYPE_MAX) {
+                pr_warning("%s: Invalid arguments, msg_type:%d\n",
                            __func__, msg_type);
                 return -EINVAL;
         }
+
         return atomic_notifier_chain_register(
                                 &opal_msg_notifier_head[msg_type], nb);
 }
 
+int opal_message_notifier_unregister(enum opal_msg_type msg_type,
+                                     struct notifier_block *nb)
+{
+        return atomic_notifier_chain_unregister(
+                        &opal_msg_notifier_head[msg_type], nb);
+}
+
 static void opal_message_do_notify(uint32_t msg_type, void *msg)
 {
         /* notify subscribers */
@@ -351,7 +357,7 @@ static void opal_handle_message(void)
         type = be32_to_cpu(msg.msg_type);
 
         /* Sanity check */
-        if (type > OPAL_MSG_TYPE_MAX) {
+        if (type >= OPAL_MSG_TYPE_MAX) {
                 pr_warning("%s: Unknown message type: %u\n", __func__, type);
                 return;
         }
@@ -744,6 +750,29 @@ static void __init opal_irq_init(struct device_node *dn)
         }
 }
 
+static int kopald(void *unused)
+{
+        set_freezable();
+        do {
+                try_to_freeze();
+                opal_poll_events(NULL);
+                msleep_interruptible(opal_heartbeat);
+        } while (!kthread_should_stop());
+
+        return 0;
+}
+
+static void opal_init_heartbeat(void)
+{
+        /* Old firwmware, we assume the HVC heartbeat is sufficient */
+        if (of_property_read_u32(opal_node, "ibm,heartbeat-ms",
+                                 &opal_heartbeat) != 0)
+                opal_heartbeat = 0;
+
+        if (opal_heartbeat)
+                kthread_run(kopald, NULL, "kopald");
+}
+
 static int __init opal_init(void)
 {
         struct device_node *np, *consoles;
@@ -772,6 +801,9 @@ static int __init opal_init(void)
         /* Create i2c platform devices */
         opal_i2c_create_devs();
 
+        /* Setup a heatbeat thread if requested by OPAL */
+        opal_init_heartbeat();
+
         /* Find all OPAL interrupts and request them */
         opal_irq_init(opal_node);
 
@@ -794,6 +826,7 @@ static int __init opal_init(void)
                 opal_msglog_init();
         }
 
+        /* Initialize OPAL IPMI backend */
         opal_ipmi_init(opal_node);
 
         return 0;