[tip:x86/memblock] memblock, x86: Make free_all_memory_core_early() explicitly free lowmem only

tip-bot for Tejun Heo
2011-07-14T21:35:25Z

Commit-ID: 64a02daacbc880bac1d6b3aeefbcd226a9341fa7
Gitweb: http://git.kernel.org/tip/64a02daacbc880bac1d6b3aeefbcd226a9341fa7
Author: Tejun Heo <tj@kernel.org>
AuthorDate: Tue, 12 Jul 2011 11:16:01 +0200
Committer: H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Thu, 14 Jul 2011 11:47:49 -0700

memblock, x86: Make free_all_memory_core_early() explicitly free lowmem only

nomemblock is currently used only by x86 and on x86_32
free_all_memory_core_early() silently freed only the low mem because
get_free_all_memory_range() in arch/x86/mm/memblock.c implicitly
limited range to max_low_pfn.

Rename free_all_memory_core_early() to free_low_memory_core_early()
and make it call __get_free_all_memory_range() and limit the range to
max_low_pfn explicitly. This makes things clearer and also is
consistent with the bootmem behavior.

This leaves get_free_all_memory_range() without any user. Kill it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/1310462166-31469-9-git-send-email-tj@kernel.org
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
arch/x86/include/asm/memblock.h | 1 -
arch/x86/mm/memblock.c | 10 ----------
arch/x86/mm/numa_64.c | 2 +-
include/linux/bootmem.h | 2 +-
mm/nobootmem.c | 8 ++++----
5 files changed, 6 insertions(+), 17 deletions(-)

diff --git a/arch/x86/include/asm/memblock.h b/arch/x86/include/asm/memblock.h
index d2a5a59..6c72eca 100644
--- a/arch/x86/include/asm/memblock.h
+++ b/arch/x86/include/asm/memblock.h
@@ -8,7 +8,6 @@ void memblock_x86_free_range(u64 start, u64 end);
struct range;
int __get_free_all_memory_range(struct range **range, int nodeid,
unsigned long start_pfn, unsigned long end_pfn);
-int get_free_all_memory_range(struct range **rangep, int nodeid);

u64 memblock_x86_hole_size(u64 start, u64 end);
u64 memblock_x86_free_memory_in_range(u64 addr, u64 limit);
diff --git a/arch/x86/mm/memblock.c b/arch/x86/mm/memblock.c
index 648d47d..0e8442a 100644
--- a/arch/x86/mm/memblock.c
+++ b/arch/x86/mm/memblock.c
@@ -89,16 +89,6 @@ int __init __get_free_all_memory_range(struct range **rangep, int nodeid,
return nr_range;
}

-int __init get_free_all_memory_range(struct range **rangep, int nodeid)
-{
- unsigned long end_pfn = -1UL;
-
-#ifdef CONFIG_X86_32
- end_pfn = max_low_pfn;
-#endif
- return __get_free_all_memory_range(rangep, nodeid, 0, end_pfn);
-}
-
static u64 __init __memblock_x86_memory_in_range(u64 addr, u64 limit, bool get_free)
{
int i, count;
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index dd27f40..92e2711 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -19,7 +19,7 @@ unsigned long __init numa_free_all_bootmem(void)
for_each_online_node(i)
pages += free_all_bootmem_node(NODE_DATA(i));

- pages += free_all_memory_core_early(MAX_NUMNODES);
+ pages += free_low_memory_core_early(MAX_NUMNODES);

return pages;
}
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index ab344a5..66d3e95 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -44,7 +44,7 @@ extern unsigned long init_bootmem_node(pg_data_t *pgdat,
unsigned long endpfn);
extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);

-unsigned long free_all_memory_core_early(int nodeid);
+extern unsigned long free_low_memory_core_early(int nodeid);
extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
extern unsigned long free_all_bootmem(void);

diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index c781626..2037a8a 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -106,7 +106,7 @@ static void __init __free_pages_memory(unsigned long start, unsigned long end)
__free_pages_bootmem(pfn_to_page(i), 0);
}

-unsigned long __init free_all_memory_core_early(int nodeid)
+unsigned long __init free_low_memory_core_early(int nodeid)
{
int i;
u64 start, end;
@@ -114,7 +114,7 @@ unsigned long __init free_all_memory_core_early(int nodeid)
struct range *range = NULL;
int nr_range;

- nr_range = get_free_all_memory_range(&range, nodeid);
+ nr_range = __get_free_all_memory_range(&range, nodeid, 0, max_low_pfn);

for (i = 0; i < nr_range; i++) {
start = range[i].start;
@@ -136,7 +136,7 @@ unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
{
register_page_bootmem_info_node(pgdat);

- /* free_all_memory_core_early(MAX_NUMNODES) will be called later */
+ /* free_low_memory_core_early(MAX_NUMNODES) will be called later */
return 0;
}

@@ -154,7 +154,7 @@ unsigned long __init free_all_bootmem(void)
* Use MAX_NUMNODES will make sure all ranges in early_node_map[]
* will be used instead of only Node0 related
*/
- return free_all_memory_core_early(MAX_NUMNODES);
+ return free_low_memory_core_early(MAX_NUMNODES);
}

/**