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Subject[RFC 3/3] mm: Remove node_boot_start from bootmem_data_t
Drop node_boot_start and convert users to node_min_pfn which is what
they really mean.

Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
CC: Richard Henderson <rth@twiddle.net>
CC: Russell King <rmk@arm.linux.org.uk>
CC: Haavard Skinnemoen <hskinnemoen@atmel.com>
CC: Tony Luck <tony.luck@intel.com>
CC: Hirokazu Takata <takata@linux-m32r.org>
CC: David Howells <dhowells@redhat.com>
CC: Paul Mundt <lethal@linux-sh.org>
CC: Ingo Molnar <mingo@elte.hu>
---

arch/alpha/mm/numa.c | 2 +-
arch/arm/plat-omap/fb.c | 4 +---
arch/avr32/mm/init.c | 3 +--
arch/ia64/mm/discontig.c | 19 ++++++++++---------
arch/m32r/mm/init.c | 4 +---
arch/mn10300/mm/init.c | 6 +++---
arch/sh/mm/init.c | 2 +-
include/linux/bootmem.h | 1 -
mm/bootmem.c | 3 ---
9 files changed, 18 insertions(+), 26 deletions(-)

--- a/arch/alpha/mm/numa.c
+++ b/arch/alpha/mm/numa.c
@@ -304,7 +304,7 @@ void __init paging_init(void)

for_each_online_node(nid) {
bootmem_data_t *bdata = &bootmem_node_data[nid];
- unsigned long start_pfn = bdata->node_boot_start >> PAGE_SHIFT;
+ unsigned long start_pfn = bdata->node_min_pfn;
unsigned long end_pfn = bdata->node_low_pfn;

if (dma_local_pfn >= end_pfn - start_pfn)
--- a/arch/arm/plat-omap/fb.c
+++ b/arch/arm/plat-omap/fb.c
@@ -182,7 +182,7 @@ void __init omapfb_reserve_sdram(void)
return;

bdata = NODE_DATA(0)->bdata;
- sdram_start = bdata->node_boot_start;
+ sdram_start = bdata->node_min_pfn << PAGE_SHIFT;
sdram_size = (bdata->node_low_pfn << PAGE_SHIFT) - sdram_start;
reserved = 0;
for (i = 0; ; i++) {
@@ -340,5 +340,3 @@ unsigned long omapfb_reserve_sram(unsign


#endif
-
-
--- a/arch/avr32/mm/init.c
+++ b/arch/avr32/mm/init.c
@@ -125,8 +125,7 @@ void __init paging_init(void)
unsigned long zones_size[MAX_NR_ZONES];
unsigned long low, start_pfn;

- start_pfn = pgdat->bdata->node_boot_start;
- start_pfn >>= PAGE_SHIFT;
+ start_pfn = pgdat->bdata->node_min_pfn;
low = pgdat->bdata->node_low_pfn;

memset(zones_size, 0, sizeof(zones_size));
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -74,17 +74,17 @@ pg_data_t *pgdat_list[MAX_NUMNODES];
static int __init build_node_maps(unsigned long start, unsigned long len,
int node)
{
- unsigned long cstart, epfn, end = start + len;
+ unsigned long spfn, epfn, end = start + len;
struct bootmem_data *bdp = &bootmem_node_data[node];

epfn = GRANULEROUNDUP(end) >> PAGE_SHIFT;
- cstart = GRANULEROUNDDOWN(start);
+ spfn = GRANULEROUNDDOWN(start) >> PAGE_SHIFT;

if (!bdp->node_low_pfn) {
- bdp->node_boot_start = cstart;
+ bdp->node_min_pfn = spfn;
bdp->node_low_pfn = epfn;
} else {
- bdp->node_boot_start = min(cstart, bdp->node_boot_start);
+ bdp->node_min_pfn = min(spfn, bdp->node_min_pfn);
bdp->node_low_pfn = max(epfn, bdp->node_low_pfn);
}

@@ -221,20 +221,21 @@ static void __init fill_pernode(int node
static int __init find_pernode_space(unsigned long start, unsigned long len,
int node)
{
- unsigned long epfn;
+ unsigned long spfn, epfn;
unsigned long pernodesize = 0, pernode, pages, mapsize;
struct bootmem_data *bdp = &bootmem_node_data[node];

+ spfn = start >> PAGE_SHIFT;
epfn = (start + len) >> PAGE_SHIFT;

- pages = bdp->node_low_pfn - (bdp->node_boot_start >> PAGE_SHIFT);
+ pages = bdp->node_low_pfn - bdp->node_min_pfn;
mapsize = bootmem_bootmap_pages(pages) << PAGE_SHIFT;

/*
* Make sure this memory falls within this node's usable memory
* since we may have thrown some away in build_maps().
*/
- if (start < bdp->node_boot_start || epfn > bdp->node_low_pfn)
+ if (spfn < bdp->node_min_pfn || epfn > bdp->node_low_pfn)
return 0;

/* Don't setup this node's local space twice... */
@@ -296,7 +297,7 @@ static void __init reserve_pernode_space
bdp = pdp->bdata;

/* First the bootmem_map itself */
- pages = bdp->node_low_pfn - (bdp->node_boot_start>>PAGE_SHIFT);
+ pages = bdp->node_low_pfn - bdp->node_min_pfn;
size = bootmem_bootmap_pages(pages) << PAGE_SHIFT;
base = __pa(bdp->node_bootmem_map);
reserve_bootmem_node(pdp, base, size, BOOTMEM_DEFAULT);
@@ -466,7 +467,7 @@ void __init find_memory(void)

init_bootmem_node(pgdat_list[node],
map>>PAGE_SHIFT,
- bdp->node_boot_start>>PAGE_SHIFT,
+ bdp->node_min_pfn,
bdp->node_low_pfn);
}

--- a/arch/m32r/mm/init.c
+++ b/arch/m32r/mm/init.c
@@ -93,8 +93,7 @@ void free_initrd_mem(unsigned long, unsi
#endif

/* It'd be good if these lines were in the standard header file. */
-#define START_PFN(nid) \
- (NODE_DATA(nid)->bdata->node_boot_start >> PAGE_SHIFT)
+#define START_PFN(nid) (NODE_DATA(nid)->bdata->node_min_pfn)
#define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn)

#ifndef CONFIG_DISCONTIGMEM
@@ -252,4 +251,3 @@ void free_initrd_mem(unsigned long start
printk (KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
}
#endif
-
--- a/arch/mn10300/mm/init.c
+++ b/arch/mn10300/mm/init.c
@@ -67,8 +67,8 @@ void __init paging_init(void)

/* declare the sizes of the RAM zones (only use the normal zone) */
zones_size[ZONE_NORMAL] =
- (contig_page_data.bdata->node_low_pfn) -
- (contig_page_data.bdata->node_boot_start >> PAGE_SHIFT);
+ contig_page_data.bdata->node_low_pfn -
+ contig_page_data.bdata->node_min_pfn;

/* pass the memory from the bootmem allocator to the main allocator */
free_area_init(zones_size);
@@ -87,7 +87,7 @@ void __init mem_init(void)
if (!mem_map)
BUG();

-#define START_PFN (contig_page_data.bdata->node_boot_start >> PAGE_SHIFT)
+#define START_PFN (contig_page_data.bdata->node_min_pfn)
#define MAX_LOW_PFN (contig_page_data.bdata->node_low_pfn)

max_mapnr = num_physpages = MAX_LOW_PFN - START_PFN;
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -191,7 +191,7 @@ void __init paging_init(void)
pg_data_t *pgdat = NODE_DATA(nid);
unsigned long low, start_pfn;

- start_pfn = pgdat->bdata->node_boot_start >> PAGE_SHIFT;
+ start_pfn = pgdat->bdata->node_min_pfn;
low = pgdat->bdata->node_low_pfn;

if (max_zone_pfns[ZONE_NORMAL] < low)
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -81,9 +81,6 @@ static unsigned long __init __init_bootm
bdata->node_min_pfn = startpfn;
bdata->node_low_pfn = endpfn;

- /* XXX: To be dropped */
- bdata->node_boot_start = startpfn << PAGE_SHIFT;
-
bytes = bootmem_bootmap_bytes(endpfn - startpfn);
memset(bdata->node_bootmem_map, 0xff, bytes);
link_bdata(bdata);
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -13,7 +13,6 @@ extern unsigned long saved_max_pfn;
#endif

typedef struct bootmem_data {
- unsigned long node_boot_start;
unsigned long node_min_pfn;
unsigned long node_low_pfn;
void *node_bootmem_map;
--


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