10 files changed, 149 insertions, 63 deletions

diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index ac0637a6d71c..fbad51fce672 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -196,7 +196,7 @@ default_entry:
         /* Do an early initialization of the fixmap area */
         movl $(swapper_pg_dir - __PAGE_OFFSET), %edx
         movl $(swapper_pg_pmd - __PAGE_OFFSET), %eax
-        addl $0x007, %eax                       /* 0x007 = PRESENT+RW+USER */
+        addl $0x67, %eax                        /* 0x67 == _PAGE_TABLE */
         movl %eax, 4092(%edx)
 
         xorl %ebx,%ebx                          /* This is the boot CPU (BSP) */
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index ba8b04b03b9f..64c66b3769c9 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -106,9 +106,9 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
                 goto err_out;
 
         /* add to the list of leds */
-        write_lock(&leds_list_lock);
+        down_write(&leds_list_lock);
         list_add_tail(&led_cdev->node, &leds_list);
-        write_unlock(&leds_list_lock);
+        up_write(&leds_list_lock);
 
 #ifdef CONFIG_LEDS_TRIGGERS
         init_rwsem(&led_cdev->trigger_lock);
@@ -155,9 +155,9 @@ void led_classdev_unregister(struct led_classdev *led_cdev)
 
         device_unregister(led_cdev->dev);
 
-        write_lock(&leds_list_lock);
+        down_write(&leds_list_lock);
         list_del(&led_cdev->node);
-        write_unlock(&leds_list_lock);
+        up_write(&leds_list_lock);
 }
 EXPORT_SYMBOL_GPL(led_classdev_unregister);
 
diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c
index 9b015f9af351..5d1ca10524b6 100644
--- a/drivers/leds/led-core.c
+++ b/drivers/leds/led-core.c
@@ -14,11 +14,11 @@
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/module.h>
-#include <linux/spinlock.h>
+#include <linux/rwsem.h>
 #include <linux/leds.h>
 #include "leds.h"
 
-DEFINE_RWLOCK(leds_list_lock);
+DECLARE_RWSEM(leds_list_lock);
 LIST_HEAD(leds_list);
 
 EXPORT_SYMBOL_GPL(leds_list);
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index 0bdb786210b1..13c9026d68af 100644
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -169,7 +169,7 @@ int led_trigger_register(struct led_trigger *trigger)
         up_write(&triggers_list_lock);
 
         /* Register with any LEDs that have this as a default trigger */
-        read_lock(&leds_list_lock);
+        down_read(&leds_list_lock);
         list_for_each_entry(led_cdev, &leds_list, node) {
                 down_write(&led_cdev->trigger_lock);
                 if (!led_cdev->trigger && led_cdev->default_trigger &&
@@ -177,7 +177,7 @@ int led_trigger_register(struct led_trigger *trigger)
                         led_trigger_set(led_cdev, trigger);
                 up_write(&led_cdev->trigger_lock);
         }
-        read_unlock(&leds_list_lock);
+        up_read(&leds_list_lock);
 
         return 0;
 }
@@ -212,14 +212,14 @@ void led_trigger_unregister(struct led_trigger *trigger)
         up_write(&triggers_list_lock);
 
         /* Remove anyone actively using this trigger */
-        read_lock(&leds_list_lock);
+        down_read(&leds_list_lock);
         list_for_each_entry(led_cdev, &leds_list, node) {
                 down_write(&led_cdev->trigger_lock);
                 if (led_cdev->trigger == trigger)
                         led_trigger_set(led_cdev, NULL);
                 up_write(&led_cdev->trigger_lock);
         }
-        read_unlock(&leds_list_lock);
+        up_read(&leds_list_lock);
 }
 
 void led_trigger_unregister_simple(struct led_trigger *trigger)
diff --git a/drivers/leds/leds-locomo.c b/drivers/leds/leds-locomo.c
index bfac499f3258..2207335e9212 100644
--- a/drivers/leds/leds-locomo.c
+++ b/drivers/leds/leds-locomo.c
@@ -19,7 +19,7 @@
 static void locomoled_brightness_set(struct led_classdev *led_cdev,
                                 enum led_brightness value, int offset)
 {
-        struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev);
+        struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev->parent);
         unsigned long flags;
 
         local_irq_save(flags);
diff --git a/drivers/leds/leds.h b/drivers/leds/leds.h
index f2f3884fe063..12b6fe93b135 100644
--- a/drivers/leds/leds.h
+++ b/drivers/leds/leds.h
@@ -14,6 +14,7 @@
 #define __LEDS_H_INCLUDED
 
 #include <linux/device.h>
+#include <linux/rwsem.h>
 #include <linux/leds.h>
 
 static inline void led_set_brightness(struct led_classdev *led_cdev,
@@ -26,7 +27,7 @@ static inline void led_set_brightness(struct led_classdev *led_cdev,
                 led_cdev->brightness_set(led_cdev, value);
 }
 
-extern rwlock_t leds_list_lock;
+extern struct rw_semaphore leds_list_lock;
 extern struct list_head leds_list;
 
 #ifdef CONFIG_LEDS_TRIGGERS
diff --git a/include/asm-x86/byteorder.h b/include/asm-x86/byteorder.h
index 1f2d6d5bf20d..fe2f2e5d51ba 100644
--- a/include/asm-x86/byteorder.h
+++ b/include/asm-x86/byteorder.h
@@ -30,13 +30,13 @@ static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 val)
         } v;
         v.u = val;
 #ifdef CONFIG_X86_BSWAP
-        asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
+        __asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
             : "=r" (v.s.a), "=r" (v.s.b)
             : "0" (v.s.a), "1" (v.s.b));
 #else
         v.s.a = ___arch__swab32(v.s.a);
         v.s.b = ___arch__swab32(v.s.b);
-        asm("xchgl %0,%1" : "=r" (v.s.a), "=r" (v.s.b) : "0" (v.s.a), "1" (v.s.b));
+        __asm__("xchgl %0,%1" : "=r" (v.s.a), "=r" (v.s.b) : "0" (v.s.a), "1" (v.s.b));
 #endif
         return v.u;
 }
diff --git a/include/asm-x86/msr.h b/include/asm-x86/msr.h
index ba4b31432120..664a2fa7adc9 100644
--- a/include/asm-x86/msr.h
+++ b/include/asm-x86/msr.h
@@ -191,38 +191,6 @@ static inline int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
 
 #define wrmsrl(msr,val) wrmsr(msr,(__u32)((__u64)(val)),((__u64)(val))>>32)
 
-/* wrmsr with exception handling */
-#define wrmsr_safe(msr,a,b) ({ int ret__;                       \
-        asm volatile("2: wrmsr ; xorl %0,%0\n"                  \
-                     "1:\n\t"                                   \
-                     ".section .fixup,\"ax\"\n\t"               \
-                     "3:  movl %4,%0 ; jmp 1b\n\t"              \
-                     ".previous\n\t"                            \
-                     ".section __ex_table,\"a\"\n"              \
-                     "   .align 8\n\t"                          \
-                     "   .quad  2b,3b\n\t"                      \
-                     ".previous"                                \
-                     : "=a" (ret__)                             \
-                     : "c" (msr), "0" (a), "d" (b), "i" (-EFAULT)); \
-        ret__; })
-
-#define checking_wrmsrl(msr,val) wrmsr_safe(msr,(u32)(val),(u32)((val)>>32))
-
-#define rdmsr_safe(msr,a,b) \
-        ({ int ret__;                                           \
-          asm volatile ("1:       rdmsr\n"                      \
-                        "2:\n"                                  \
-                        ".section .fixup,\"ax\"\n"              \
-                        "3:       movl %4,%0\n"                 \
-                        " jmp 2b\n"                             \
-                        ".previous\n"                           \
-                        ".section __ex_table,\"a\"\n"           \
-                        " .align 8\n"                           \
-                        " .quad 1b,3b\n"                                \
-                        ".previous":"=&bDS" (ret__), "=a"(*(a)), "=d"(*(b)) \
-                        :"c"(msr), "i"(-EIO), "0"(0));                  \
-          ret__; })
-
 #define rdtsc(low,high) \
      __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
 
@@ -230,17 +198,17 @@ static inline int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
      __asm__ __volatile__ ("rdtsc" : "=a" (low) : : "edx")
 
 #define rdtscp(low,high,aux) \
-     asm volatile (".byte 0x0f,0x01,0xf9" : "=a" (low), "=d" (high), "=c" (aux))
+     __asm__ __volatile__ (".byte 0x0f,0x01,0xf9" : "=a" (low), "=d" (high), "=c" (aux))
 
 #define rdtscll(val) do { \
      unsigned int __a,__d; \
-     asm volatile("rdtsc" : "=a" (__a), "=d" (__d)); \
+     __asm__ __volatile__("rdtsc" : "=a" (__a), "=d" (__d)); \
      (val) = ((unsigned long)__a) | (((unsigned long)__d)<<32); \
 } while(0)
 
 #define rdtscpll(val, aux) do { \
      unsigned long __a, __d; \
-     asm volatile (".byte 0x0f,0x01,0xf9" : "=a" (__a), "=d" (__d), "=c" (aux)); \
+     __asm__ __volatile__ (".byte 0x0f,0x01,0xf9" : "=a" (__a), "=d" (__d), "=c" (aux)); \
      (val) = (__d << 32) | __a; \
 } while (0)
 
@@ -253,6 +221,7 @@ static inline int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
                           : "=a" (low), "=d" (high) \
                           : "c" (counter))
 
+
 static inline void cpuid(int op, unsigned int *eax, unsigned int *ebx,
                          unsigned int *ecx, unsigned int *edx)
 {
@@ -320,6 +289,40 @@ static inline unsigned int cpuid_edx(unsigned int op)
         return edx;
 }
 
+#ifdef __KERNEL__
+
+/* wrmsr with exception handling */
+#define wrmsr_safe(msr,a,b) ({ int ret__;                       \
+        asm volatile("2: wrmsr ; xorl %0,%0\n"                  \
+                     "1:\n\t"                                   \
+                     ".section .fixup,\"ax\"\n\t"               \
+                     "3:  movl %4,%0 ; jmp 1b\n\t"              \
+                     ".previous\n\t"                            \
+                     ".section __ex_table,\"a\"\n"              \
+                     "   .align 8\n\t"                          \
+                     "   .quad  2b,3b\n\t"                      \
+                     ".previous"                                \
+                     : "=a" (ret__)                             \
+                     : "c" (msr), "0" (a), "d" (b), "i" (-EFAULT)); \
+        ret__; })
+
+#define checking_wrmsrl(msr,val) wrmsr_safe(msr,(u32)(val),(u32)((val)>>32))
+
+#define rdmsr_safe(msr,a,b) \
+        ({ int ret__;                                           \
+          asm volatile ("1:       rdmsr\n"                      \
+                        "2:\n"                                  \
+                        ".section .fixup,\"ax\"\n"              \
+                        "3:       movl %4,%0\n"                 \
+                        " jmp 2b\n"                             \
+                        ".previous\n"                           \
+                        ".section __ex_table,\"a\"\n"           \
+                        " .align 8\n"                           \
+                        " .quad 1b,3b\n"                                \
+                        ".previous":"=&bDS" (ret__), "=a"(*(a)), "=d"(*(b)) \
+                        :"c"(msr), "i"(-EIO), "0"(0));                  \
+          ret__; })
+
 #ifdef CONFIG_SMP
 void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h);
 void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h);
@@ -343,6 +346,7 @@ static inline int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
         return wrmsr_safe(msr_no, l, h);
 }
 #endif  /* CONFIG_SMP */
+#endif  /* __KERNEL__ */
 #endif  /* __ASSEMBLY__ */
 
 #endif  /* !__i386__ */
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 40801e754afb..b7d9408a00ff 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -200,4 +200,6 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
 }
 #endif
 
+extern const struct seq_operations slabinfo_op;
+
 #endif /* _LINUX_SLUB_DEF_H */
diff --git a/mm/slub.c b/mm/slub.c
index 3655ad359f03..903dabd92daf 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3076,6 +3076,19 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
         return slab_alloc(s, gfpflags, node, caller);
 }
 
+static unsigned long count_partial(struct kmem_cache_node *n)
+{
+        unsigned long flags;
+        unsigned long x = 0;
+        struct page *page;
+
+        spin_lock_irqsave(&n->list_lock, flags);
+        list_for_each_entry(page, &n->partial, lru)
+                x += page->inuse;
+        spin_unlock_irqrestore(&n->list_lock, flags);
+        return x;
+}
+
 #if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
 static int validate_slab(struct kmem_cache *s, struct page *page,
                                                 unsigned long *map)
@@ -3458,19 +3471,6 @@ static int list_locations(struct kmem_cache *s, char *buf,
         return n;
 }
 
-static unsigned long count_partial(struct kmem_cache_node *n)
-{
-        unsigned long flags;
-        unsigned long x = 0;
-        struct page *page;
-
-        spin_lock_irqsave(&n->list_lock, flags);
-        list_for_each_entry(page, &n->partial, lru)
-                x += page->inuse;
-        spin_unlock_irqrestore(&n->list_lock, flags);
-        return x;
-}
-
 enum slab_stat_type {
         SL_FULL,
         SL_PARTIAL,
@@ -4123,3 +4123,82 @@ static int __init slab_sysfs_init(void)
 
 __initcall(slab_sysfs_init);
 #endif
+
+/*
+ * The /proc/slabinfo ABI
+ */
+#ifdef CONFIG_PROC_FS
+
+static void print_slabinfo_header(struct seq_file *m)
+{
+        seq_puts(m, "slabinfo - version: 2.1\n");
+        seq_puts(m, "# name            <active_objs> <num_objs> <objsize> "
+                 "<objperslab> <pagesperslab>");
+        seq_puts(m, " : tunables <limit> <batchcount> <sharedfactor>");
+        seq_puts(m, " : slabdata <active_slabs> <num_slabs> <sharedavail>");
+        seq_putc(m, '\n');
+}
+
+static void *s_start(struct seq_file *m, loff_t *pos)
+{
+        loff_t n = *pos;
+
+        down_read(&slub_lock);
+        if (!n)
+                print_slabinfo_header(m);
+
+        return seq_list_start(&slab_caches, *pos);
+}
+
+static void *s_next(struct seq_file *m, void *p, loff_t *pos)
+{
+        return seq_list_next(p, &slab_caches, pos);
+}
+
+static void s_stop(struct seq_file *m, void *p)
+{
+        up_read(&slub_lock);
+}
+
+static int s_show(struct seq_file *m, void *p)
+{
+        unsigned long nr_partials = 0;
+        unsigned long nr_slabs = 0;
+        unsigned long nr_inuse = 0;
+        unsigned long nr_objs;
+        struct kmem_cache *s;
+        int node;
+
+        s = list_entry(p, struct kmem_cache, list);
+
+        for_each_online_node(node) {
+                struct kmem_cache_node *n = get_node(s, node);
+
+                if (!n)
+                        continue;
+
+                nr_partials += n->nr_partial;
+                nr_slabs += atomic_long_read(&n->nr_slabs);
+                nr_inuse += count_partial(n);
+        }
+
+        nr_objs = nr_slabs * s->objects;
+        nr_inuse += (nr_slabs - nr_partials) * s->objects;
+
+        seq_printf(m, "%-17s %6lu %6lu %6u %4u %4d", s->name, nr_inuse,
+                   nr_objs, s->size, s->objects, (1 << s->order));
+        seq_printf(m, " : tunables %4u %4u %4u", 0, 0, 0);
+        seq_printf(m, " : slabdata %6lu %6lu %6lu", nr_slabs, nr_slabs,
+                   0UL);
+        seq_putc(m, '\n');
+        return 0;
+}
+
+const struct seq_operations slabinfo_op = {
+        .start = s_start,
+        .next = s_next,
+        .stop = s_stop,
+        .show = s_show,
+};
+
+#endif /* CONFIG_PROC_FS */