4 files changed, 50 insertions, 69 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index f219c30eb4e1..c2dbf1416b94 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -64,6 +64,7 @@ config ARM
         select IRQ_FORCED_THREADING
         select KTIME_SCALAR
         select MODULES_USE_ELF_REL
+        select NO_BOOTMEM
         select OLD_SIGACTION
         select OLD_SIGSUSPEND3
         select PERF_USE_VMALLOC
diff --git a/arch/arm/include/asm/bitops.h b/arch/arm/include/asm/bitops.h
index e691ec91e4d3..b2e298a90d76 100644
--- a/arch/arm/include/asm/bitops.h
+++ b/arch/arm/include/asm/bitops.h
@@ -254,25 +254,59 @@ static inline int constant_fls(int x)
 }
 
 /*
- * On ARMv5 and above those functions can be implemented around
- * the clz instruction for much better code efficiency.
+ * On ARMv5 and above those functions can be implemented around the
+ * clz instruction for much better code efficiency.  __clz returns
+ * the number of leading zeros, zero input will return 32, and
+ * 0x80000000 will return 0.
  */
+static inline unsigned int __clz(unsigned int x)
+{
+        unsigned int ret;
+
+        asm("clz\t%0, %1" : "=r" (ret) : "r" (x));
 
+        return ret;
+}
+
+/*
+ * fls() returns zero if the input is zero, otherwise returns the bit
+ * position of the last set bit, where the LSB is 1 and MSB is 32.
+ */
 static inline int fls(int x)
 {
-        int ret;
-
         if (__builtin_constant_p(x))
                return constant_fls(x);
 
-        asm("clz\t%0, %1" : "=r" (ret) : "r" (x));
-        ret = 32 - ret;
-        return ret;
+        return 32 - __clz(x);
+}
+
+/*
+ * __fls() returns the bit position of the last bit set, where the
+ * LSB is 0 and MSB is 31.  Zero input is undefined.
+ */
+static inline unsigned long __fls(unsigned long x)
+{
+        return fls(x) - 1;
+}
+
+/*
+ * ffs() returns zero if the input was zero, otherwise returns the bit
+ * position of the first set bit, where the LSB is 1 and MSB is 32.
+ */
+static inline int ffs(int x)
+{
+        return fls(x & -x);
+}
+
+/*
+ * __ffs() returns the bit position of the first bit set, where the
+ * LSB is 0 and MSB is 31.  Zero input is undefined.
+ */
+static inline unsigned long __ffs(unsigned long x)
+{
+        return ffs(x) - 1;
 }
 
-#define __fls(x) (fls(x) - 1)
-#define ffs(x) ({ unsigned long __t = (x); fls(__t & -__t); })
-#define __ffs(x) (ffs(x) - 1)
 #define ffz(x) __ffs( ~(x) )
 
 #endif
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 061cea820e3f..a4729c6be25d 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -831,7 +831,7 @@ static void __init reserve_crashkernel(void)
         if (ret)
                 return;
 
-        ret = reserve_bootmem(crash_base, crash_size, BOOTMEM_EXCLUSIVE);
+        ret = memblock_reserve(crash_base, crash_size);
         if (ret < 0) {
                 pr_warn("crashkernel reservation failed - memory is in use (0x%lx)\n",
                         (unsigned long)crash_base);
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 3e8f106ee5fe..6dd66a999d9f 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -145,58 +145,6 @@ static void __init find_limits(unsigned long *min, unsigned long *max_low,
         *max_high = bank_pfn_end(&mi->bank[mi->nr_banks - 1]);
 }
 
-static void __init arm_bootmem_init(unsigned long start_pfn,
-        unsigned long end_pfn)
-{
-        struct memblock_region *reg;
-        unsigned int boot_pages;
-        phys_addr_t bitmap;
-        pg_data_t *pgdat;
-
-        /*
-         * Allocate the bootmem bitmap page.  This must be in a region
-         * of memory which has already been mapped.
-         */
-        boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
-        bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES,
-                                __pfn_to_phys(end_pfn));
-
-        /*
-         * Initialise the bootmem allocator, handing the
-         * memory banks over to bootmem.
-         */
-        node_set_online(0);
-        pgdat = NODE_DATA(0);
-        init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn);
-
-        /* Free the lowmem regions from memblock into bootmem. */
-        for_each_memblock(memory, reg) {
-                unsigned long start = memblock_region_memory_base_pfn(reg);
-                unsigned long end = memblock_region_memory_end_pfn(reg);
-
-                if (end >= end_pfn)
-                        end = end_pfn;
-                if (start >= end)
-                        break;
-
-                free_bootmem(__pfn_to_phys(start), (end - start) << PAGE_SHIFT);
-        }
-
-        /* Reserve the lowmem memblock reserved regions in bootmem. */
-        for_each_memblock(reserved, reg) {
-                unsigned long start = memblock_region_reserved_base_pfn(reg);
-                unsigned long end = memblock_region_reserved_end_pfn(reg);
-
-                if (end >= end_pfn)
-                        end = end_pfn;
-                if (start >= end)
-                        break;
-
-                reserve_bootmem(__pfn_to_phys(start),
-                                (end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT);
-        }
-}
-
 #ifdef CONFIG_ZONE_DMA
 
 phys_addr_t arm_dma_zone_size __read_mostly;
@@ -236,7 +184,7 @@ void __init setup_dma_zone(const struct machine_desc *mdesc)
 #endif
 }
 
-static void __init arm_bootmem_free(unsigned long min, unsigned long max_low,
+static void __init zone_sizes_init(unsigned long min, unsigned long max_low,
         unsigned long max_high)
 {
         unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
@@ -384,7 +332,6 @@ void __init arm_memblock_init(struct meminfo *mi,
         dma_contiguous_reserve(min(arm_dma_limit, arm_lowmem_limit));
 
         arm_memblock_steal_permitted = false;
-        memblock_allow_resize();
         memblock_dump_all();
 }
 
@@ -392,12 +339,11 @@ void __init bootmem_init(void)
 {
         unsigned long min, max_low, max_high;
 
+        memblock_allow_resize();
         max_low = max_high = 0;
 
         find_limits(&min, &max_low, &max_high);
 
-        arm_bootmem_init(min, max_low);
-
         /*
          * Sparsemem tries to allocate bootmem in memory_present(),
          * so must be done after the fixed reservations
@@ -414,7 +360,7 @@ void __init bootmem_init(void)
          * the sparse mem_map arrays initialized by sparse_init()
          * for memmap_init_zone(), otherwise all PFNs are invalid.
          */
-        arm_bootmem_free(min, max_low, max_high);
+        zone_sizes_init(min, max_low, max_high);
 
         /*
          * This doesn't seem to be used by the Linux memory manager any
@@ -587,7 +533,7 @@ void __init mem_init(void)
         extern u32 itcm_end;
 #endif
 
-        max_mapnr   = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
+        set_max_mapnr(pfn_to_page(max_pfn) - mem_map);
 
         /* this will put all unused low memory onto the freelists */
         free_unused_memmap(&meminfo);