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Date: Thu, 11 Mar 2010 10:44:20 +1100
From: Benjamin Herrenschmidt <benh@...nel.crashing.org>
To: Yinghai Lu <yinghai@...nel.org>
Cc: 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>,
linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [RFC PATCH 6/6] sparc64: use early_res and nobootmem
On Wed, 2010-03-10 at 13:24 -0800, Yinghai Lu wrote:
> use early_res/fw_memmap to replace lmb, so could use early_res replace bootme
> later.
So you are proposing to replace an existing reasonably simple (though I
admit it could be made cleaner) piece of code that fits our bill (LMB)
with something larger and full of x86 centric grottiness for what good
reason ?
Cheers,
Ben.
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>
> ---
> arch/sparc/Kconfig | 17 ++
> arch/sparc/configs/sparc64_defconfig | 1
> arch/sparc/include/asm/lmb.h | 10 -
> arch/sparc/include/asm/pgtable_64.h | 2
> arch/sparc/kernel/mdesc.c | 18 +-
> arch/sparc/kernel/prom_64.c | 7
> arch/sparc/kernel/setup_64.c | 19 --
> arch/sparc/mm/init_64.c | 247 ++++++++++++++++-------------------
> 8 files changed, 155 insertions(+), 166 deletions(-)
>
> Index: linux-2.6/arch/sparc/Kconfig
> ===================================================================
> --- linux-2.6.orig/arch/sparc/Kconfig
> +++ linux-2.6/arch/sparc/Kconfig
> @@ -39,7 +39,6 @@ config SPARC64
> select HAVE_FUNCTION_TRACER
> select HAVE_KRETPROBES
> select HAVE_KPROBES
> - select HAVE_LMB
> select HAVE_SYSCALL_WRAPPERS
> select HAVE_DYNAMIC_FTRACE
> select HAVE_FTRACE_MCOUNT_RECORD
> @@ -90,6 +89,10 @@ config STACKTRACE_SUPPORT
> bool
> default y if SPARC64
>
> +config HAVE_EARLY_RES
> + bool
> + default y if SPARC64
> +
> config LOCKDEP_SUPPORT
> bool
> default y if SPARC64
> @@ -284,6 +287,18 @@ config GENERIC_HARDIRQS
> source "kernel/time/Kconfig"
>
> if SPARC64
> +
> +config NO_BOOTMEM
> + default y
> + bool "Disable Bootmem code"
> + ---help---
> + Use early_res directly instead of bootmem before slab is ready.
> + - allocator (buddy) [generic]
> + - early allocator (bootmem) [generic]
> + - very early allocator (reserve_early*()) [generic]
> + So reduce one layer between early allocator to final allocator
> +
> +
> source "drivers/cpufreq/Kconfig"
>
> config US3_FREQ
> Index: linux-2.6/arch/sparc/include/asm/pgtable_64.h
> ===================================================================
> --- linux-2.6.orig/arch/sparc/include/asm/pgtable_64.h
> +++ linux-2.6/arch/sparc/include/asm/pgtable_64.h
> @@ -752,6 +752,8 @@ extern int io_remap_pfn_range(struct vm_
> #define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
> #define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
>
> +#define MAXMEM _AC(__AC(1,UL)<<60, UL)
> +
> #include <asm-generic/pgtable.h>
>
> /* We provide our own get_unmapped_area to cope with VA holes and
> Index: linux-2.6/arch/sparc/kernel/mdesc.c
> ===================================================================
> --- linux-2.6.orig/arch/sparc/kernel/mdesc.c
> +++ linux-2.6/arch/sparc/kernel/mdesc.c
> @@ -4,7 +4,8 @@
> */
> #include <linux/kernel.h>
> #include <linux/types.h>
> -#include <linux/lmb.h>
> +#include <linux/fw_memmap.h>
> +#include <linux/early_res.h>
> #include <linux/log2.h>
> #include <linux/list.h>
> #include <linux/slab.h>
> @@ -86,7 +87,7 @@ static void mdesc_handle_init(struct mde
> hp->handle_size = handle_size;
> }
>
> -static struct mdesc_handle * __init mdesc_lmb_alloc(unsigned int mdesc_size)
> +static struct mdesc_handle * __init mdesc_early_alloc(unsigned int mdesc_size)
> {
> unsigned int handle_size, alloc_size;
> struct mdesc_handle *hp;
> @@ -97,17 +98,18 @@ static struct mdesc_handle * __init mdes
> mdesc_size);
> alloc_size = PAGE_ALIGN(handle_size);
>
> - paddr = lmb_alloc(alloc_size, PAGE_SIZE);
> + paddr = find_e820_area(0, -1UL, alloc_size, PAGE_SIZE);
>
> hp = NULL;
> if (paddr) {
> + reserve_early(paddr, paddr + alloc_size, "mdesc");
> hp = __va(paddr);
> mdesc_handle_init(hp, handle_size, hp);
> }
> return hp;
> }
>
> -static void mdesc_lmb_free(struct mdesc_handle *hp)
> +static void mdesc_early_free(struct mdesc_handle *hp)
> {
> unsigned int alloc_size;
> unsigned long start;
> @@ -120,9 +122,9 @@ static void mdesc_lmb_free(struct mdesc_
> free_bootmem_late(start, alloc_size);
> }
>
> -static struct mdesc_mem_ops lmb_mdesc_ops = {
> - .alloc = mdesc_lmb_alloc,
> - .free = mdesc_lmb_free,
> +static struct mdesc_mem_ops early_mdesc_ops = {
> + .alloc = mdesc_early_alloc,
> + .free = mdesc_early_free,
> };
>
> static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size)
> @@ -914,7 +916,7 @@ void __init sun4v_mdesc_init(void)
>
> printk("MDESC: Size is %lu bytes.\n", len);
>
> - hp = mdesc_alloc(len, &lmb_mdesc_ops);
> + hp = mdesc_alloc(len, &early_mdesc_ops);
> if (hp == NULL) {
> prom_printf("MDESC: alloc of %lu bytes failed.\n", len);
> prom_halt();
> Index: linux-2.6/arch/sparc/kernel/prom_64.c
> ===================================================================
> --- linux-2.6.orig/arch/sparc/kernel/prom_64.c
> +++ linux-2.6/arch/sparc/kernel/prom_64.c
> @@ -20,7 +20,8 @@
> #include <linux/string.h>
> #include <linux/mm.h>
> #include <linux/module.h>
> -#include <linux/lmb.h>
> +#include <linux/fw_memmap.h>
> +#include <linux/early_res.h>
> #include <linux/of_device.h>
>
> #include <asm/prom.h>
> @@ -34,14 +35,14 @@
>
> void * __init prom_early_alloc(unsigned long size)
> {
> - unsigned long paddr = lmb_alloc(size, SMP_CACHE_BYTES);
> + unsigned long paddr = find_e820_area(0, -1UL, size, SMP_CACHE_BYTES);
> void *ret;
>
> if (!paddr) {
> prom_printf("prom_early_alloc(%lu) failed\n");
> prom_halt();
> }
> -
> + reserve_early(paddr, paddr + size, "prom_alloc");
> ret = __va(paddr);
> memset(ret, 0, size);
> prom_early_allocated += size;
> Index: linux-2.6/arch/sparc/kernel/setup_64.c
> ===================================================================
> --- linux-2.6.orig/arch/sparc/kernel/setup_64.c
> +++ linux-2.6/arch/sparc/kernel/setup_64.c
> @@ -139,21 +139,7 @@ static void __init boot_flags_init(char
> process_switch(*commands++);
> continue;
> }
> - if (!strncmp(commands, "mem=", 4)) {
> - /*
> - * "mem=XXX[kKmM]" overrides the PROM-reported
> - * memory size.
> - */
> - cmdline_memory_size = simple_strtoul(commands + 4,
> - &commands, 0);
> - if (*commands == 'K' || *commands == 'k') {
> - cmdline_memory_size <<= 10;
> - commands++;
> - } else if (*commands=='M' || *commands=='m') {
> - cmdline_memory_size <<= 20;
> - commands++;
> - }
> - }
> +
> while (*commands && *commands != ' ')
> commands++;
> }
> @@ -279,11 +265,14 @@ void __init boot_cpu_id_too_large(int cp
> }
> #endif
>
> +void __init setup_memory_map(void);
> +
> void __init setup_arch(char **cmdline_p)
> {
> /* Initialize PROM console and command line. */
> *cmdline_p = prom_getbootargs();
> strcpy(boot_command_line, *cmdline_p);
> + setup_memory_map();
> parse_early_param();
>
> boot_flags_init(*cmdline_p);
> Index: linux-2.6/arch/sparc/mm/init_64.c
> ===================================================================
> --- linux-2.6.orig/arch/sparc/mm/init_64.c
> +++ linux-2.6/arch/sparc/mm/init_64.c
> @@ -24,7 +24,8 @@
> #include <linux/cache.h>
> #include <linux/sort.h>
> #include <linux/percpu.h>
> -#include <linux/lmb.h>
> +#include <linux/fw_memmap.h>
> +#include <linux/early_res.h>
> #include <linux/mmzone.h>
>
> #include <asm/head.h>
> @@ -726,7 +727,7 @@ static void __init find_ramdisk(unsigned
> initrd_start = ramdisk_image;
> initrd_end = ramdisk_image + sparc_ramdisk_size;
>
> - lmb_reserve(initrd_start, sparc_ramdisk_size);
> + reserve_early(initrd_start, initrd_end, "initrd");
>
> initrd_start += PAGE_OFFSET;
> initrd_end += PAGE_OFFSET;
> @@ -737,7 +738,9 @@ static void __init find_ramdisk(unsigned
> struct node_mem_mask {
> unsigned long mask;
> unsigned long val;
> +#ifndef CONFIG_NO_BOOTMEM
> unsigned long bootmem_paddr;
> +#endif
> };
> static struct node_mem_mask node_masks[MAX_NUMNODES];
> static int num_node_masks;
> @@ -818,40 +821,51 @@ static unsigned long long nid_range(unsi
> */
> static void __init allocate_node_data(int nid)
> {
> - unsigned long paddr, num_pages, start_pfn, end_pfn;
> + unsigned long paddr, start_pfn, end_pfn;
> struct pglist_data *p;
>
> + get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
> +
> #ifdef CONFIG_NEED_MULTIPLE_NODES
> - paddr = lmb_alloc_nid(sizeof(struct pglist_data),
> - SMP_CACHE_BYTES, nid, nid_range);
> + paddr = find_e820_area(start_pfn << PAGE_SHIFT, end_pfn << PAGE_SHIFT,
> + sizeof(struct pglist_data), SMP_CACHE_BYTES);
> if (!paddr) {
> prom_printf("Cannot allocate pglist_data for nid[%d]\n", nid);
> prom_halt();
> }
> + reserve_early(paddr, paddr + sizeof(struct pglist_data), "NODEDATA");
> NODE_DATA(nid) = __va(paddr);
> memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
>
> +#ifndef CONFIG_NO_BOOTMEM
> NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
> #endif
> +#endif
>
> p = NODE_DATA(nid);
>
> - get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
> + p->node_id = nid;
> p->node_start_pfn = start_pfn;
> p->node_spanned_pages = end_pfn - start_pfn;
>
> +#ifndef CONFIG_NO_BOOTMEM
> if (p->node_spanned_pages) {
> + unsigned long num_pages;
> num_pages = bootmem_bootmap_pages(p->node_spanned_pages);
>
> - paddr = lmb_alloc_nid(num_pages << PAGE_SHIFT, PAGE_SIZE, nid,
> - nid_range);
> + paddr = find_e820_area(start_pfn << PAGE_SHIFT,
> + end_pfn << PAGE_SHIFT,
> + num_pages << PAGE_SHIFT, PAGE_SIZE);
> if (!paddr) {
> prom_printf("Cannot allocate bootmap for nid[%d]\n",
> nid);
> prom_halt();
> }
> + reserve_early(paddr, paddr + (num_pages << PAGE_SHIFT),
> + "BOOTMAP");
> node_masks[nid].bootmem_paddr = paddr;
> }
> +#endif
> }
>
> static void init_node_masks_nonnuma(void)
> @@ -972,30 +986,27 @@ int of_node_to_nid(struct device_node *d
>
> static void __init add_node_ranges(void)
> {
> - int i;
>
> - for (i = 0; i < lmb.memory.cnt; i++) {
> - unsigned long size = lmb_size_bytes(&lmb.memory, i);
> - unsigned long start, end;
> + unsigned long size = max_pfn << PAGE_SHIFT;
> + unsigned long start, end;
> +
> + start = 0;
> + end = start + size;
> + while (start < end) {
> + unsigned long this_end;
> + int nid;
>
> - start = lmb.memory.region[i].base;
> - end = start + size;
> - while (start < end) {
> - unsigned long this_end;
> - int nid;
> -
> - this_end = nid_range(start, end, &nid);
> -
> - numadbg("Adding active range nid[%d] "
> - "start[%lx] end[%lx]\n",
> - nid, start, this_end);
> -
> - add_active_range(nid,
> - start >> PAGE_SHIFT,
> - this_end >> PAGE_SHIFT);
> + this_end = nid_range(start, end, &nid);
>
> - start = this_end;
> - }
> + numadbg("Adding active range nid[%d] "
> + "start[%lx] end[%lx]\n",
> + nid, start, this_end);
> +
> + e820_register_active_regions(nid,
> + start >> PAGE_SHIFT,
> + this_end >> PAGE_SHIFT);
> +
> + start = this_end;
> }
> }
>
> @@ -1010,11 +1021,13 @@ static int __init grab_mlgroups(struct m
> if (!count)
> return -ENOENT;
>
> - paddr = lmb_alloc(count * sizeof(struct mdesc_mlgroup),
> + paddr = find_e820_area(0, -1UL, count * sizeof(struct mdesc_mlgroup),
> SMP_CACHE_BYTES);
> if (!paddr)
> return -ENOMEM;
>
> + reserve_early(paddr, paddr + count * sizeof(struct mdesc_mlgroup),
> + "mlgroups");
> mlgroups = __va(paddr);
> num_mlgroups = count;
>
> @@ -1051,10 +1064,11 @@ static int __init grab_mblocks(struct md
> if (!count)
> return -ENOENT;
>
> - paddr = lmb_alloc(count * sizeof(struct mdesc_mblock),
> + paddr = find_e820_area(0, -1UL, count * sizeof(struct mdesc_mblock),
> SMP_CACHE_BYTES);
> if (!paddr)
> return -ENOMEM;
> + reserve_early(paddr, count * sizeof(struct mdesc_mblock), "mblocks");
>
> mblocks = __va(paddr);
> num_mblocks = count;
> @@ -1279,9 +1293,8 @@ static int bootmem_init_numa(void)
>
> static void __init bootmem_init_nonnuma(void)
> {
> - unsigned long top_of_ram = lmb_end_of_DRAM();
> - unsigned long total_ram = lmb_phys_mem_size();
> - unsigned int i;
> + unsigned long top_of_ram = max_pfn << PAGE_SHIFT;
> + unsigned long total_ram = top_of_ram - e820_hole_size(0, top_of_ram);
>
> numadbg("bootmem_init_nonnuma()\n");
>
> @@ -1292,61 +1305,21 @@ static void __init bootmem_init_nonnuma(
>
> init_node_masks_nonnuma();
>
> - for (i = 0; i < lmb.memory.cnt; i++) {
> - unsigned long size = lmb_size_bytes(&lmb.memory, i);
> - unsigned long start_pfn, end_pfn;
> -
> - if (!size)
> - continue;
> -
> - start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT;
> - end_pfn = start_pfn + lmb_size_pages(&lmb.memory, i);
> - add_active_range(0, start_pfn, end_pfn);
> - }
> + remove_all_active_ranges();
> + e820_register_active_regions(0, 0, top_of_ram);
>
> allocate_node_data(0);
>
> node_set_online(0);
> }
>
> -static void __init reserve_range_in_node(int nid, unsigned long start,
> - unsigned long end)
> -{
> - numadbg(" reserve_range_in_node(nid[%d],start[%lx],end[%lx]\n",
> - nid, start, end);
> - while (start < end) {
> - unsigned long this_end;
> - int n;
> -
> - this_end = nid_range(start, end, &n);
> - if (n == nid) {
> - numadbg(" MATCH reserving range [%lx:%lx]\n",
> - start, this_end);
> - reserve_bootmem_node(NODE_DATA(nid), start,
> - (this_end - start), BOOTMEM_DEFAULT);
> - } else
> - numadbg(" NO MATCH, advancing start to %lx\n",
> - this_end);
> -
> - start = this_end;
> - }
> -}
> -
> -static void __init trim_reserved_in_node(int nid)
> +int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
> + int flags)
> {
> - int i;
> -
> - numadbg(" trim_reserved_in_node(%d)\n", nid);
> -
> - for (i = 0; i < lmb.reserved.cnt; i++) {
> - unsigned long start = lmb.reserved.region[i].base;
> - unsigned long size = lmb_size_bytes(&lmb.reserved, i);
> - unsigned long end = start + size;
> -
> - reserve_range_in_node(nid, start, end);
> - }
> + return reserve_bootmem(phys, len, flags);
> }
>
> +#ifndef CONFIG_NO_BOOTMEM
> static void __init bootmem_init_one_node(int nid)
> {
> struct pglist_data *p;
> @@ -1371,20 +1344,26 @@ static void __init bootmem_init_one_node
> nid, end_pfn);
> free_bootmem_with_active_regions(nid, end_pfn);
>
> - trim_reserved_in_node(nid);
> -
> - numadbg(" sparse_memory_present_with_active_regions(%d)\n",
> - nid);
> - sparse_memory_present_with_active_regions(nid);
> }
> }
> +#endif
> +
> +u64 __init get_max_mapped(void)
> +{
> + /* what is max_pfn_mapped for sparc64 ? */
> + u64 end = max_pfn;
> +
> + end <<= PAGE_SHIFT;
> +
> + return end;
> +}
>
> static unsigned long __init bootmem_init(unsigned long phys_base)
> {
> unsigned long end_pfn;
> int nid;
>
> - end_pfn = lmb_end_of_DRAM() >> PAGE_SHIFT;
> + end_pfn = e820_end_of_ram_pfn();
> max_pfn = max_low_pfn = end_pfn;
> min_low_pfn = (phys_base >> PAGE_SHIFT);
>
> @@ -1392,10 +1371,23 @@ static unsigned long __init bootmem_init
> bootmem_init_nonnuma();
>
> /* XXX cpu notifier XXX */
> -
> +#ifndef CONFIG_NO_BOOTMEM
> for_each_online_node(nid)
> bootmem_init_one_node(nid);
>
> + early_res_to_bootmem(0, end_pfn << PAGE_SHIFT);
> +#endif
> +
> + for_each_online_node(nid) {
> + struct pglist_data *p;
> + p = NODE_DATA(nid);
> + if (p->node_spanned_pages) {
> + numadbg(" sparse_memory_present_with_active_regions(%d)\n",
> + nid);
> + sparse_memory_present_with_active_regions(nid);
> + }
> + }
> +
> sparse_init();
>
> return end_pfn;
> @@ -1681,9 +1673,36 @@ pgd_t swapper_pg_dir[2048];
> static void sun4u_pgprot_init(void);
> static void sun4v_pgprot_init(void);
>
> +void __init setup_memory_map(void)
> +{
> + int i;
> + unsigned long phys_base;
> + /* Find available physical memory...
> + *
> + * Read it twice in order to work around a bug in openfirmware.
> + * The call to grab this table itself can cause openfirmware to
> + * allocate memory, which in turn can take away some space from
> + * the list of available memory. Reading it twice makes sure
> + * we really do get the final value.
> + */
> + read_obp_translations();
> + read_obp_memory("reg", &pall[0], &pall_ents);
> + read_obp_memory("available", &pavail[0], &pavail_ents);
> + read_obp_memory("available", &pavail[0], &pavail_ents);
> +
> + phys_base = 0xffffffffffffffffUL;
> + for (i = 0; i < pavail_ents; i++) {
> + phys_base = min(phys_base, pavail[i].phys_addr);
> + e820_add_region(pavail[i].phys_addr, pavail[i].reg_size,
> + E820_RAM);
> + }
> +
> + find_ramdisk(phys_base);
> +}
> +
> void __init paging_init(void)
> {
> - unsigned long end_pfn, shift, phys_base;
> + unsigned long end_pfn, shift;
> unsigned long real_end, i;
>
> /* These build time checkes make sure that the dcache_dirty_cpu()
> @@ -1734,35 +1753,7 @@ void __init paging_init(void)
> sun4v_ktsb_init();
> }
>
> - lmb_init();
> -
> - /* Find available physical memory...
> - *
> - * Read it twice in order to work around a bug in openfirmware.
> - * The call to grab this table itself can cause openfirmware to
> - * allocate memory, which in turn can take away some space from
> - * the list of available memory. Reading it twice makes sure
> - * we really do get the final value.
> - */
> - read_obp_translations();
> - read_obp_memory("reg", &pall[0], &pall_ents);
> - read_obp_memory("available", &pavail[0], &pavail_ents);
> - read_obp_memory("available", &pavail[0], &pavail_ents);
> -
> - phys_base = 0xffffffffffffffffUL;
> - for (i = 0; i < pavail_ents; i++) {
> - phys_base = min(phys_base, pavail[i].phys_addr);
> - lmb_add(pavail[i].phys_addr, pavail[i].reg_size);
> - }
> -
> - lmb_reserve(kern_base, kern_size);
> -
> - find_ramdisk(phys_base);
> -
> - lmb_enforce_memory_limit(cmdline_memory_size);
> -
> - lmb_analyze();
> - lmb_dump_all();
> + reserve_early(kern_base, kern_base + kern_size, "Kernel");
>
> set_bit(0, mmu_context_bmap);
>
> @@ -1815,13 +1806,18 @@ void __init paging_init(void)
> * IRQ stacks.
> */
> for_each_possible_cpu(i) {
> + unsigned long paddr;
> /* XXX Use node local allocations... XXX */
> - softirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
> - hardirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
> + paddr = find_e820_area(0, -1UL, THREAD_SIZE, THREAD_SIZE);
> + reserve_early(paddr, paddr + THREAD_SIZE, "softirq_stack");
> + softirq_stack[i] = __va(paddr);
> + paddr = find_e820_area(0, -1UL, THREAD_SIZE, THREAD_SIZE);
> + reserve_early(paddr, paddr + THREAD_SIZE, "hardirq_stack");
> + hardirq_stack[i] = __va(paddr);
> }
>
> /* Setup bootmem... */
> - last_valid_pfn = end_pfn = bootmem_init(phys_base);
> + last_valid_pfn = end_pfn = bootmem_init(0);
>
> #ifndef CONFIG_NEED_MULTIPLE_NODES
> max_mapnr = last_valid_pfn;
> @@ -1957,6 +1953,9 @@ void __init mem_init(void)
> free_all_bootmem_node(NODE_DATA(i));
> }
> }
> +# ifdef CONFIG_NO_BOOTMEM
> + totalram_pages += free_all_memory_core_early(MAX_NUMNODES);
> +# endif
> }
> #else
> totalram_pages = free_all_bootmem();
> @@ -2002,14 +2001,6 @@ void free_initmem(void)
> unsigned long addr, initend;
> int do_free = 1;
>
> - /* If the physical memory maps were trimmed by kernel command
> - * line options, don't even try freeing this initmem stuff up.
> - * The kernel image could have been in the trimmed out region
> - * and if so the freeing below will free invalid page structs.
> - */
> - if (cmdline_memory_size)
> - do_free = 0;
> -
> /*
> * The init section is aligned to 8k in vmlinux.lds. Page align for >8k pagesizes.
> */
> Index: linux-2.6/arch/sparc/configs/sparc64_defconfig
> ===================================================================
> --- linux-2.6.orig/arch/sparc/configs/sparc64_defconfig
> +++ linux-2.6/arch/sparc/configs/sparc64_defconfig
> @@ -1916,5 +1916,4 @@ CONFIG_DECOMPRESS_LZO=y
> CONFIG_HAS_IOMEM=y
> CONFIG_HAS_IOPORT=y
> CONFIG_HAS_DMA=y
> -CONFIG_HAVE_LMB=y
> CONFIG_NLATTR=y
> Index: linux-2.6/arch/sparc/include/asm/lmb.h
> ===================================================================
> --- linux-2.6.orig/arch/sparc/include/asm/lmb.h
> +++ /dev/null
> @@ -1,10 +0,0 @@
> -#ifndef _SPARC64_LMB_H
> -#define _SPARC64_LMB_H
> -
> -#include <asm/oplib.h>
> -
> -#define LMB_DBG(fmt...) prom_printf(fmt)
> -
> -#define LMB_REAL_LIMIT 0
> -
> -#endif /* !(_SPARC64_LMB_H) */
> --
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