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-rw-r--r--arch/mips/mm/init.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index b8cb0dde3af..5240432e6d1 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -8,6 +8,7 @@
* Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
*/
+#include <linux/bug.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/signal.h>
@@ -26,6 +27,7 @@
#include <linux/proc_fs.h>
#include <linux/pfn.h>
+#include <asm/asm-offsets.h>
#include <asm/bootinfo.h>
#include <asm/cachectl.h>
#include <asm/cpu.h>
@@ -131,6 +133,8 @@ void *kmap_coherent(struct page *page, unsigned long addr)
pte_t pte;
int tlbidx;
+ BUG_ON(Page_dcache_dirty(page));
+
inc_preempt_count();
idx = (addr >> PAGE_SHIFT) & (FIX_N_COLOURS - 1);
#ifdef CONFIG_MIPS_MT_SMTC
@@ -207,7 +211,7 @@ void copy_user_highpage(struct page *to, struct page *from,
void *vfrom, *vto;
vto = kmap_atomic(to, KM_USER1);
- if (cpu_has_dc_aliases) {
+ if (cpu_has_dc_aliases && !Page_dcache_dirty(from)) {
vfrom = kmap_coherent(from, vaddr);
copy_page(vto, vfrom);
kunmap_coherent();
@@ -498,7 +502,13 @@ unsigned long pgd_current[NR_CPUS];
* different layout ...
*/
#define __page_aligned(order) __attribute__((__aligned__(PAGE_SIZE<<order)))
-pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned(PGD_ORDER);
+
+/*
+ * gcc 3.3 and older have trouble determining that PTRS_PER_PGD and PGD_ORDER
+ * are constants. So we use the variants from asm-offset.h until that gcc
+ * will officially be retired.
+ */
+pgd_t swapper_pg_dir[_PTRS_PER_PGD] __page_aligned(_PGD_ORDER);
#ifdef CONFIG_64BIT
#ifdef MODULE_START
pgd_t module_pg_dir[PTRS_PER_PGD] __page_aligned(PGD_ORDER);