Revert "x86_64: allocate sparsemem memmap above 4G"

patch 6a22c57b8d2a62dea7280a6b2ac807a539ef0716 in mainline.

This reverts commit 2e1c49db4c640b35df13889b86b9d62215ade4b6.

First off, testing in Fedora has shown it to cause boot failures,
bisected down by Martin Ebourne, and reported by Dave Jobes.  So the
commit will likely be reverted in the 2.6.23 stable kernels.

Secondly, in the 2.6.24 model, x86-64 has now grown support for
SPARSEMEM_VMEMMAP, which disables the relevant code anyway, so while the
bug is not visible any more, it's become invisible due to the code just
being irrelevant and no longer enabled on the only architecture that
this ever affected.

backported to 2.6.22 by Chuck Ebbert

Reported-by: Dave Jones <davej@redhat.com>
Tested-by: Martin Ebourne <fedora@ebourne.me.uk>
Cc: Zou Nan hai <nanhai.zou@intel.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index 9a0e98accf04aae3e11282e3079fd747afa646a3..b7e514e158c430aa7adc7d73598512e42319ca4f 100644 (file)
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -769,8 +769,3 @@ int in_gate_area_no_task(unsigned long addr)
        return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END);
 }
 
-void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size)
-{
-       return __alloc_bootmem_core(pgdat->bdata, size,
-                       SMP_CACHE_BYTES, (4UL*1024*1024*1024), 0);
-}

diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index c83534ee1e796c46b2cc47c129ad3924cedbeb20..0365ec9fc0c9248422801fe71b232d1188a12972 100644 (file)
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -59,7 +59,6 @@ extern void *__alloc_bootmem_core(struct bootmem_data *bdata,
                                  unsigned long align,
                                  unsigned long goal,
                                  unsigned long limit);
-extern void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size);
 
 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
 extern void reserve_bootmem(unsigned long addr, unsigned long size);

diff --git a/mm/sparse.c b/mm/sparse.c
index e03b39f3540f79adf384c476f185e7a9da91e4ac..fdc145480995bd4629601cc93891029732b3bf06 100644 (file)
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -209,12 +209,6 @@ static int __meminit sparse_init_one_section(struct mem_section *ms,
        return 1;
 }
 
-__attribute__((weak))
-void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size)
-{
-       return NULL;
-}
-
 static struct page __init *sparse_early_mem_map_alloc(unsigned long pnum)
 {
        struct page *map;
@@ -225,11 +219,6 @@ static struct page __init *sparse_early_mem_map_alloc(unsigned long pnum)
        if (map)
                return map;
 
-       map = alloc_bootmem_high_node(NODE_DATA(nid),
-                       sizeof(struct page) * PAGES_PER_SECTION);
-       if (map)
-               return map;
-
        map = alloc_bootmem_node(NODE_DATA(nid),
                        sizeof(struct page) * PAGES_PER_SECTION);
        if (map)