ARM: 8025/1: Get rid of meminfo

memblock is now fully integrated into the kernel and is the prefered
method for tracking memory. Rather than reinvent the wheel with
meminfo, migrate to using memblock directly instead of meminfo as
an intermediate.

Acked-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 8 insertions, 22 deletions

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 50e198c1e9c8..6d78ba47ea5b 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -628,15 +628,8 @@ void __init dump_machine_table(void)
 
 int __init arm_add_memory(u64 start, u64 size)
 {
-        struct membank *bank = &meminfo.bank[meminfo.nr_banks];
         u64 aligned_start;
 
-        if (meminfo.nr_banks >= NR_BANKS) {
-                pr_crit("NR_BANKS too low, ignoring memory at 0x%08llx\n",
-                        (long long)start);
-                return -EINVAL;
-        }
-
         /*
          * Ensure that start/size are aligned to a page boundary.
          * Size is appropriately rounded down, start is rounded up.
@@ -677,17 +670,17 @@ int __init arm_add_memory(u64 start, u64 size)
                 aligned_start = PHYS_OFFSET;
         }
 
-        bank->start = aligned_start;
-        bank->size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
+        start = aligned_start;
+        size = size & ~(phys_addr_t)(PAGE_SIZE - 1);
 
         /*
          * Check whether this memory region has non-zero size or
          * invalid node number.
          */
-        if (bank->size == 0)
+        if (size == 0)
                 return -EINVAL;
 
-        meminfo.nr_banks++;
+        memblock_add(start, size);
         return 0;
 }
 
@@ -695,6 +688,7 @@ int __init arm_add_memory(u64 start, u64 size)
  * Pick out the memory size.  We look for mem=size@start,
  * where start and size are "size[KkMm]"
  */
+
 static int __init early_mem(char *p)
 {
         static int usermem __initdata = 0;
@@ -709,7 +703,8 @@ static int __init early_mem(char *p)
          */
         if (usermem == 0) {
                 usermem = 1;
-                meminfo.nr_banks = 0;
+                memblock_remove(memblock_start_of_DRAM(),
+                        memblock_end_of_DRAM() - memblock_start_of_DRAM());
         }
 
         start = PHYS_OFFSET;
@@ -854,13 +849,6 @@ static void __init reserve_crashkernel(void)
 static inline void reserve_crashkernel(void) {}
 #endif /* CONFIG_KEXEC */
 
-static int __init meminfo_cmp(const void *_a, const void *_b)
-{
-        const struct membank *a = _a, *b = _b;
-        long cmp = bank_pfn_start(a) - bank_pfn_start(b);
-        return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
-}
-
 void __init hyp_mode_check(void)
 {
 #ifdef CONFIG_ARM_VIRT_EXT
@@ -903,12 +891,10 @@ void __init setup_arch(char **cmdline_p)
 
         parse_early_param();
 
-        sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
-
         early_paging_init(mdesc, lookup_processor_type(read_cpuid_id()));
         setup_dma_zone(mdesc);
         sanity_check_meminfo();
-        arm_memblock_init(&meminfo, mdesc);
+        arm_memblock_init(mdesc);
 
         paging_init(mdesc);
         request_standard_resources(mdesc);