Merge bk://linux.bkbits.net/linux-2.5

into samba.org:/home/anton/ppc64/for-linus-ppc64

arch/ppc64/kernel/idle.c

@@ -84,8 +84,6 @@ int cpu_idle(void)
 	lpaca = get_paca();
 
 	while (1) {
-		irq_stat[smp_processor_id()].idle_timestamp = jiffies;
-
 		if (lpaca->xLpPaca.xSharedProc) {
 			if (ItLpQueue_isLpIntPending(lpaca->lpQueuePtr))
 				process_iSeries_events();
@@ -125,7 +123,6 @@ int cpu_idle(void)
 	long oldval;
 
 	while (1) {
-		irq_stat[smp_processor_id()].idle_timestamp = jiffies;
 		oldval = test_and_clear_thread_flag(TIF_NEED_RESCHED);
 
 		if (!oldval) {

arch/ppc64/kernel/misc.S

@@ -359,7 +359,7 @@ _GLOBAL(_outsl)
 	bdnz	00b
 	blr	
 
-_GLOBAL(ide_insw)
+/* _GLOBAL(ide_insw) now in drivers/ide/ide-iops.c */
 _GLOBAL(_insw_ns)
 	cmpwi	0,r5,0
 	mtctr	r5
@@ -371,7 +371,7 @@ _GLOBAL(_insw_ns)
 	bdnz	00b
 	blr
 
-_GLOBAL(ide_outsw)
+/* _GLOBAL(ide_outsw) now in drivers/ide/ide-iops.c */
 _GLOBAL(_outsw_ns)
 	cmpwi	0,r5,0
 	mtctr	r5

arch/ppc64/kernel/ppc_ksyms.c

@@ -227,3 +227,4 @@ EXPORT_SYMBOL(debugger_fault_handler);
 #endif
 
 EXPORT_SYMBOL(tb_ticks_per_usec);
+EXPORT_SYMBOL(paca);

arch/ppc64/mm/init.c

@@ -726,3 +726,22 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long ea,
 	__hash_page(ea, pte_val(pte) & (_PAGE_USER|_PAGE_RW), vsid, ptep,
 		    0x300, local);
 }
+
+kmem_cache_t *zero_cache;
+
+static void zero_ctor(void *pte, kmem_cache_t *cache, unsigned long flags)
+{
+	memset(pte, 0, PAGE_SIZE);
+}
+
+void pgtable_cache_init(void)
+{
+	zero_cache = kmem_cache_create("zero",
+				PAGE_SIZE,
+				0,
+				SLAB_HWCACHE_ALIGN | SLAB_MUST_HWCACHE_ALIGN,
+				zero_ctor,
+				NULL);
+	if (!zero_cache)
+		panic("pgtable_cache_init(): could not create zero_cache!\n");
+}

arch/ppc64/mm/numa.c

@@ -306,6 +306,7 @@ void __init paging_init(void)
 {
 	unsigned long zones_size[MAX_NR_ZONES];
 	int i, nid;
+	struct page *node_mem_map; 
 
 	for (i = 1; i < MAX_NR_ZONES; i++)
 		zones_size[i] = 0;
@@ -314,16 +315,24 @@ void __init paging_init(void)
 		unsigned long start_pfn;
 		unsigned long end_pfn;
 
-		if (node_data[nid].node_spanned_pages == 0)
-			continue;
-
 		start_pfn = plat_node_bdata[nid].node_boot_start >> PAGE_SHIFT;
 		end_pfn = plat_node_bdata[nid].node_low_pfn;
 
 		zones_size[ZONE_DMA] = end_pfn - start_pfn;
 		dbg("free_area_init node %d %lx %lx\n", nid,
 				zones_size[ZONE_DMA], start_pfn);
-		free_area_init_node(nid, NODE_DATA(nid), NULL, zones_size,
-				    start_pfn, NULL);
+
+		/* 
+		 * Give this empty node a dummy struct page to avoid
+		 * us from trying to allocate a node local mem_map
+		 * in free_area_init_node (which will fail).
+		 */
+		if (!node_data[nid].node_spanned_pages)
+			node_mem_map = alloc_bootmem(sizeof(struct page));
+		else
+			node_mem_map = NULL;
+
+		free_area_init_node(nid, NODE_DATA(nid), node_mem_map,
+				    zones_size, start_pfn, NULL);
 	}
 }

include/asm-ppc64/hardirq.h

@@ -15,9 +15,7 @@
 
 typedef struct {
 	unsigned int __softirq_pending;
-	unsigned int __syscall_count;
 	struct task_struct * __ksoftirqd_task;
-	unsigned long idle_timestamp;
 } ____cacheline_aligned irq_cpustat_t;
 
 #include <linux/irq_cpustat.h>	/* Standard mappings for irq_cpustat_t above */

include/asm-ppc64/io.h

@@ -17,6 +17,12 @@
 #include <asm/memory.h>
 #include <asm/delay.h>
 
+#define __ide_mm_insw(p, a, c) _insw_ns((volatile u16 *)(p), (a), (c))
+#define __ide_mm_insl(p, a, c) _insl_ns((volatile u32 *)(p), (a), (c))
+#define __ide_mm_outsw(p, a, c) _outsw_ns((volatile u16 *)(p), (a), (c))
+#define __ide_mm_outsl(p, a, c) _outsl_ns((volatile u32 *)(p), (a), (c))
+
+
 #define SIO_CONFIG_RA	0x398
 #define SIO_CONFIG_RD	0x399
 
@@ -93,7 +99,7 @@ extern void _outsl_ns(volatile u32 *port, const void *buf, int nl);
 #define inw_p(port)             inw(port)
 #define outw_p(val, port)       (udelay(1), outw((val), (port)))
 #define inl_p(port)             inl(port)
-#define outl_p(val, port)       (udelay(1), outl((val, (port)))
+#define outl_p(val, port)       (udelay(1), outl((val), (port)))
 
 /*
  * The *_ns versions below don't do byte-swapping.

include/asm-ppc64/pgalloc.h

@@ -2,8 +2,11 @@
 #define _PPC64_PGALLOC_H
 
 #include <linux/mm.h>
+#include <linux/slab.h>
 #include <asm/processor.h>
 
+extern kmem_cache_t *zero_cache;
+
 /*
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -14,16 +17,13 @@
 static inline pgd_t *
 pgd_alloc(struct mm_struct *mm)
 {
-	pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL);
-	if (pgd != NULL)
-		clear_page(pgd);
-	return pgd;
+	return kmem_cache_alloc(zero_cache, GFP_KERNEL);
 }
 
 static inline void
 pgd_free(pgd_t *pgd)
 {
-	free_page((unsigned long)pgd);
+	kmem_cache_free(zero_cache, pgd);
 }
 
 #define pgd_populate(MM, PGD, PMD)	pgd_set(PGD, PMD)
@@ -31,18 +31,13 @@ pgd_free(pgd_t *pgd)
 static inline pmd_t *
 pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
 {
-	pmd_t *pmd;
-
-	pmd = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
-	if (pmd)
-		clear_page(pmd);
-	return pmd;
+	return kmem_cache_alloc(zero_cache, GFP_KERNEL|__GFP_REPEAT);
 }
 
 static inline void
 pmd_free(pmd_t *pmd)
 {
-	free_page((unsigned long)pmd);
+	kmem_cache_free(zero_cache, pmd);
 }
 
 #define __pmd_free_tlb(tlb, pmd)	pmd_free(pmd)
@@ -54,12 +49,7 @@ pmd_free(pmd_t *pmd)
 static inline pte_t *
 pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr)
 {
-	pte_t *pte;
-
-	pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
-	if (pte)
-		clear_page(pte);
-	return pte;
+	return kmem_cache_alloc(zero_cache, GFP_KERNEL|__GFP_REPEAT);
 }
 
 static inline struct page *
@@ -76,7 +66,7 @@ pte_alloc_one(struct mm_struct *mm, unsigned long address)
 static inline void
 pte_free_kernel(pte_t *pte)
 {
-	free_page((unsigned long)pte);
+	kmem_cache_free(zero_cache, pte);
 }
 
 #define pte_free(pte_page)	pte_free_kernel(page_address(pte_page))

include/asm-ppc64/pgtable.h

@@ -395,10 +395,7 @@ extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
 
 #define io_remap_page_range remap_page_range 
 
-/*
- * No page table caches to initialise
- */
-#define pgtable_cache_init()	do { } while (0)
+void pgtable_cache_init(void);
 
 extern void hpte_init_pSeries(void);
 extern void hpte_init_iSeries(void);

include/asm-ppc64/siginfo.h

@@ -8,7 +8,7 @@
  * 2 of the License, or (at your option) any later version.
  */
 
-#define SI_PAD_SIZE    ((SI_MAX_SIZE/sizeof(int)) - 4)
+#define __ARCH_SI_PREAMBLE_SIZE	(4 * sizeof(int))
 #define SI_PAD_SIZE32		((SI_MAX_SIZE/sizeof(int)) - 3)
 
 #include <asm-generic/siginfo.h>