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Date: Mon, 19 Jul 2010 16:56:41 -0700
From: Yinghai Lu <yinghai@...nel.org>
To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>,
David Miller <davem@...emloft.net>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Johannes Weiner <hannes@...xchg.org>,
linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 32/49] memblock: Add ARCH_DISCARD_MEMBLOCK to put memblock code to .init
So those memblock bits could be released after kernel is booted up.
Arch code could define ARCH_DISCARD_MEMBLOCK in asm/memblock.h,
__init_memblock will become __init, __initdata_memblock will becom __initdata
x86 code will use that.
if ARCH_DISCARD_MEMBLOCK is defined, debugfs is not used
-v2: use ARCH_DISCARD_MEMBLOCK according to Michael Ellerman
Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
include/linux/memblock.h | 8 +++++++
mm/memblock.c | 48 +++++++++++++++++++++++-----------------------
2 files changed, 32 insertions(+), 24 deletions(-)
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 4aaaf0d..751a4eb 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -148,6 +148,14 @@ static inline unsigned long memblock_region_pages(const struct memblock_region *
region++)
+#ifdef ARCH_DISCARD_MEMBLOCK
+#define __init_memblock __init
+#define __initdata_memblock __initdata
+#else
+#define __init_memblock
+#define __initdata_memblock
+#endif
+
#endif /* CONFIG_HAVE_MEMBLOCK */
#endif /* __KERNEL__ */
diff --git a/mm/memblock.c b/mm/memblock.c
index 3d0a754..7471dac 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -20,12 +20,12 @@
#include <linux/seq_file.h>
#include <linux/memblock.h>
-struct memblock memblock;
+struct memblock memblock __initdata_memblock;
-int memblock_debug;
-int memblock_can_resize;
-static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS + 1];
-struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS + 1];
+int memblock_debug __initdata_memblock;
+int memblock_can_resize __initdata_memblock;
+static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS + 1] __initdata_memblock;
+struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS + 1] __initdata_memblock;
/* inline so we don't get a warning when pr_debug is compiled out */
static inline const char *memblock_type_name(struct memblock_type *type)
@@ -42,23 +42,23 @@ static inline const char *memblock_type_name(struct memblock_type *type)
* Address comparison utilities
*/
-static phys_addr_t memblock_align_down(phys_addr_t addr, phys_addr_t size)
+static phys_addr_t __init_memblock memblock_align_down(phys_addr_t addr, phys_addr_t size)
{
return addr & ~(size - 1);
}
-static phys_addr_t memblock_align_up(phys_addr_t addr, phys_addr_t size)
+static phys_addr_t __init_memblock memblock_align_up(phys_addr_t addr, phys_addr_t size)
{
return (addr + (size - 1)) & ~(size - 1);
}
-static unsigned long memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
+static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
phys_addr_t base2, phys_addr_t size2)
{
return ((base1 < (base2 + size2)) && (base2 < (base1 + size1)));
}
-static long memblock_addrs_adjacent(phys_addr_t base1, phys_addr_t size1,
+static long __init_memblock memblock_addrs_adjacent(phys_addr_t base1, phys_addr_t size1,
phys_addr_t base2, phys_addr_t size2)
{
if (base2 == base1 + size1)
@@ -69,7 +69,7 @@ static long memblock_addrs_adjacent(phys_addr_t base1, phys_addr_t size1,
return 0;
}
-static long memblock_regions_adjacent(struct memblock_type *type,
+static long __init_memblock memblock_regions_adjacent(struct memblock_type *type,
unsigned long r1, unsigned long r2)
{
phys_addr_t base1 = type->regions[r1].base;
@@ -80,7 +80,7 @@ static long memblock_regions_adjacent(struct memblock_type *type,
return memblock_addrs_adjacent(base1, size1, base2, size2);
}
-long memblock_overlaps_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size)
+long __init_memblock memblock_overlaps_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size)
{
unsigned long i;
@@ -156,7 +156,7 @@ static phys_addr_t __init memblock_find_base(phys_addr_t size, phys_addr_t align
return MEMBLOCK_ERROR;
}
-static void memblock_remove_region(struct memblock_type *type, unsigned long r)
+static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r)
{
unsigned long i;
@@ -168,7 +168,7 @@ static void memblock_remove_region(struct memblock_type *type, unsigned long r)
}
/* Assumption: base addr of region 1 < base addr of region 2 */
-static void memblock_coalesce_regions(struct memblock_type *type,
+static void __init_memblock memblock_coalesce_regions(struct memblock_type *type,
unsigned long r1, unsigned long r2)
{
type->regions[r1].size += type->regions[r2].size;
@@ -178,7 +178,7 @@ static void memblock_coalesce_regions(struct memblock_type *type,
/* Defined below but needed now */
static long memblock_add_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size);
-static int memblock_double_array(struct memblock_type *type)
+static int __init_memblock memblock_double_array(struct memblock_type *type)
{
struct memblock_region *new_array, *old_array;
phys_addr_t old_size, new_size, addr;
@@ -249,13 +249,13 @@ static int memblock_double_array(struct memblock_type *type)
return 0;
}
-extern int __weak memblock_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1,
+extern int __init_memblock __weak memblock_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1,
phys_addr_t addr2, phys_addr_t size2)
{
return 1;
}
-static long memblock_add_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size)
+static long __init_memblock memblock_add_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size)
{
unsigned long coalesced = 0;
long adjacent, i;
@@ -342,13 +342,13 @@ static long memblock_add_region(struct memblock_type *type, phys_addr_t base, ph
return 0;
}
-long memblock_add(phys_addr_t base, phys_addr_t size)
+long __init_memblock memblock_add(phys_addr_t base, phys_addr_t size)
{
return memblock_add_region(&memblock.memory, base, size);
}
-static long __memblock_remove(struct memblock_type *type, phys_addr_t base, phys_addr_t size)
+static long __init_memblock __memblock_remove(struct memblock_type *type, phys_addr_t base, phys_addr_t size)
{
phys_addr_t rgnbegin, rgnend;
phys_addr_t end = base + size;
@@ -396,7 +396,7 @@ static long __memblock_remove(struct memblock_type *type, phys_addr_t base, phys
return memblock_add_region(type, end, rgnend - end);
}
-long memblock_remove(phys_addr_t base, phys_addr_t size)
+long __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size)
{
return __memblock_remove(&memblock.memory, base, size);
}
@@ -562,7 +562,7 @@ phys_addr_t __init memblock_phys_mem_size(void)
return memblock.memory_size;
}
-phys_addr_t memblock_end_of_DRAM(void)
+phys_addr_t __init_memblock memblock_end_of_DRAM(void)
{
int idx = memblock.memory.cnt - 1;
@@ -623,7 +623,7 @@ int __init memblock_is_reserved(phys_addr_t addr)
return 0;
}
-int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size)
+int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size)
{
return memblock_overlaps_region(&memblock.reserved, base, size);
}
@@ -634,7 +634,7 @@ void __init memblock_set_current_limit(phys_addr_t limit)
memblock.current_limit = limit;
}
-static void memblock_dump(struct memblock_type *region, char *name)
+static void __init_memblock memblock_dump(struct memblock_type *region, char *name)
{
unsigned long long base, size;
int i;
@@ -650,7 +650,7 @@ static void memblock_dump(struct memblock_type *region, char *name)
}
}
-void memblock_dump_all(void)
+void __init_memblock memblock_dump_all(void)
{
if (!memblock_debug)
return;
@@ -716,7 +716,7 @@ static int __init early_memblock(char *p)
}
early_param("memblock", early_memblock);
-#ifdef CONFIG_DEBUG_FS
+#if defined(CONFIG_DEBUG_FS) && !defined(ARCH_DISCARD_MEMBLOCK)
static int memblock_debug_show(struct seq_file *m, void *private)
{
--
1.6.4.2
--
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