ARM: move memory layout sanity checking before meminfo initialization

Ensure that the meminfo array is sanity checked before we pass the
memory to memblock.  This helps to ensure that memblock and meminfo
agree on the dimensions of memory, especially when more memory is
passed than the kernel can deal with.

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index ed11fb08b05a5b2d3fd022d981970c01c9fdc088..acbb447ac6b5eae7d5a0d5d99297ab3091a7869b 100644 (file)
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -73,6 +73,7 @@ __setup("fpe=", fpe_setup);
 #endif
 
 extern void paging_init(struct machine_desc *desc);
+extern void sanity_check_meminfo(void);
 extern void reboot_setup(char *str);
 
 unsigned int processor_id;
@@ -900,6 +901,7 @@ void __init setup_arch(char **cmdline_p)
 
        parse_early_param();
 
+       sanity_check_meminfo();
        arm_memblock_init(&meminfo, mdesc);
 
        paging_init(mdesc);

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 9d9e736c2b4f4afe2a90190d8b583c8e1f0c656a..594d677b92c883c25c4d5051bcc635394984b6f6 100644 (file)
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -759,7 +759,7 @@ early_param("vmalloc", early_vmalloc);
 
 static phys_addr_t lowmem_limit __initdata = 0;
 
-static void __init sanity_check_meminfo(void)
+void __init sanity_check_meminfo(void)
 {
        int i, j, highmem = 0;
 
@@ -1032,8 +1032,9 @@ void __init paging_init(struct machine_desc *mdesc)
 {
        void *zero_page;
 
+       memblock_set_current_limit(lowmem_limit);
+
        build_mem_type_table();
-       sanity_check_meminfo();
        prepare_page_table();
        map_lowmem();
        devicemaps_init(mdesc);

diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c
index 687d02319a41ea68afcfe65698204a4db84d8400..941a98c9e8aaf327b5131227ccaddb1d697ad2e5 100644 (file)
--- a/arch/arm/mm/nommu.c
+++ b/arch/arm/mm/nommu.c
@@ -27,6 +27,10 @@ void __init arm_mm_memblock_reserve(void)
        memblock_reserve(CONFIG_VECTORS_BASE, PAGE_SIZE);
 }
 
+void __init sanity_check_meminfo(void)
+{
+}
+
 /*
  * paging_init() sets up the page tables, initialises the zone memory
  * maps, and sets up the zero page, bad page and bad page tables.