[SPARC64]: Start using LMB information in bootmem_init().

This allows us to kill the incredibly complicated and stupid function
trim_pavail().

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 126 deletions

diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 6eb76243fa9d..3e6c4ecb8fee 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -775,115 +775,6 @@ static unsigned long __init choose_bootmap_pfn(unsigned long start_pfn,
         prom_halt();
 }
 
-static void __init trim_pavail(unsigned long *cur_size_p,
-                               unsigned long *end_of_phys_p)
-{
-        unsigned long to_trim = *cur_size_p - cmdline_memory_size;
-        unsigned long avoid_start, avoid_end;
-        int i;
-
-        to_trim = PAGE_ALIGN(to_trim);
-
-        avoid_start = avoid_end = 0;
-#ifdef CONFIG_BLK_DEV_INITRD
-        avoid_start = initrd_start;
-        avoid_end = PAGE_ALIGN(initrd_end);
-#endif
-
-        /* Trim some pavail[] entries in order to satisfy the
-         * requested "mem=xxx" kernel command line specification.
-         *
-         * We must not trim off the kernel image area nor the
-         * initial ramdisk range (if any).  Also, we must not trim
-         * any pavail[] entry down to zero in order to preserve
-         * the invariant that all pavail[] entries have a non-zero
-         * size which is assumed by all of the code in here.
-         */
-        for (i = 0; i < pavail_ents; i++) {
-                unsigned long start, end, kern_end;
-                unsigned long trim_low, trim_high, n;
-
-                kern_end = PAGE_ALIGN(kern_base + kern_size);
-
-                trim_low = start = pavail[i].phys_addr;
-                trim_high = end = start + pavail[i].reg_size;
-
-                if (kern_base >= start &&
-                    kern_base < end) {
-                        trim_low = kern_base;
-                        if (kern_end >= end)
-                                continue;
-                }
-                if (kern_end >= start &&
-                    kern_end < end) {
-                        trim_high = kern_end;
-                }
-                if (avoid_start &&
-                    avoid_start >= start &&
-                    avoid_start < end) {
-                        if (trim_low > avoid_start)
-                                trim_low = avoid_start;
-                        if (avoid_end >= end)
-                                continue;
-                }
-                if (avoid_end &&
-                    avoid_end >= start &&
-                    avoid_end < end) {
-                        if (trim_high < avoid_end)
-                                trim_high = avoid_end;
-                }
-
-                if (trim_high <= trim_low)
-                        continue;
-
-                if (trim_low == start && trim_high == end) {
-                        /* Whole chunk is available for trimming.
-                         * Trim all except one page, in order to keep
-                         * entry non-empty.
-                         */
-                        n = (end - start) - PAGE_SIZE;
-                        if (n > to_trim)
-                                n = to_trim;
-
-                        if (n) {
-                                pavail[i].phys_addr += n;
-                                pavail[i].reg_size -= n;
-                                to_trim -= n;
-                        }
-                } else {
-                        n = (trim_low - start);
-                        if (n > to_trim)
-                                n = to_trim;
-
-                        if (n) {
-                                pavail[i].phys_addr += n;
-                                pavail[i].reg_size -= n;
-                                to_trim -= n;
-                        }
-                        if (to_trim) {
-                                n = end - trim_high;
-                                if (n > to_trim)
-                                        n = to_trim;
-                                if (n) {
-                                        pavail[i].reg_size -= n;
-                                        to_trim -= n;
-                                }
-                        }
-                }
-
-                if (!to_trim)
-                        break;
-        }
-
-        /* Recalculate.  */
-        *cur_size_p = 0UL;
-        for (i = 0; i < pavail_ents; i++) {
-                *end_of_phys_p = pavail[i].phys_addr +
-                        pavail[i].reg_size;
-                *cur_size_p += pavail[i].reg_size;
-        }
-}
-
 static void __init find_ramdisk(unsigned long phys_base)
 {
 #ifdef CONFIG_BLK_DEV_INITRD
@@ -935,25 +826,11 @@ static unsigned long __init bootmem_init(unsigned long *pages_avail,
                                          unsigned long phys_base)
 {
         unsigned long bootmap_size, end_pfn;
-        unsigned long end_of_phys_memory = 0UL;
-        unsigned long bootmap_pfn, bytes_avail, size;
+        unsigned long bootmap_pfn, size;
         int i;
 
-        bytes_avail = 0UL;
-        for (i = 0; i < pavail_ents; i++) {
-                end_of_phys_memory = pavail[i].phys_addr +
-                        pavail[i].reg_size;
-                bytes_avail += pavail[i].reg_size;
-        }
-
-        if (cmdline_memory_size &&
-            bytes_avail > cmdline_memory_size)
-                trim_pavail(&bytes_avail,
-                            &end_of_phys_memory);
-
-        *pages_avail = bytes_avail >> PAGE_SHIFT;
-
-        end_pfn = end_of_phys_memory >> PAGE_SHIFT;
+        *pages_avail = lmb_phys_mem_size() >> PAGE_SHIFT;
+        end_pfn = lmb_end_of_DRAM() >> PAGE_SHIFT;
 
         /* Initialize the boot-time allocator. */
         max_pfn = max_low_pfn = end_pfn;
@@ -1355,6 +1232,9 @@ void __init paging_init(void)
 
         find_ramdisk(phys_base);
 
+        if (cmdline_memory_size)
+                lmb_enforce_memory_limit(phys_base + cmdline_memory_size);
+
         lmb_analyze();
         lmb_dump_all();