[MIPS] MT: Fix bug in multithreaded kernels.

[linux-2.6-omap-h63xx.git] / arch / sh64 / mm / ioremap.c

diff --git a/arch/sh64/mm/ioremap.c b/arch/sh64/mm/ioremap.c
index 80c56754f51309f0d9f2c09238fe4ce8a04082d9..535304e6601f6d8987baba19e39cf09dd46b485b 100644 (file)
--- a/arch/sh64/mm/ioremap.c
+++ b/arch/sh64/mm/ioremap.c
@@ -18,106 +18,17 @@
 #include <linux/vmalloc.h>
 #include <linux/sched.h>
 #include <linux/string.h>
-#include <asm/io.h>
-#include <asm/pgalloc.h>
-#include <asm/tlbflush.h>
+#include <linux/io.h>
 #include <linux/ioport.h>
 #include <linux/bootmem.h>
 #include <linux/proc_fs.h>
+#include <linux/module.h>
+#include <asm/pgalloc.h>
+#include <asm/tlbflush.h>
 
 static void shmedia_mapioaddr(unsigned long, unsigned long);
 static unsigned long shmedia_ioremap(struct resource *, u32, int);
 
-static inline void remap_area_pte(pte_t * pte, unsigned long address, unsigned long size,
-       unsigned long phys_addr, unsigned long flags)
-{
-       unsigned long end;
-       unsigned long pfn;
-       pgprot_t pgprot = __pgprot(_PAGE_PRESENT  | _PAGE_READ   |
-                                  _PAGE_WRITE    | _PAGE_DIRTY  |
-                                  _PAGE_ACCESSED | _PAGE_SHARED | flags);
-
-       address &= ~PMD_MASK;
-       end = address + size;
-       if (end > PMD_SIZE)
-               end = PMD_SIZE;
-       if (address >= end)
-               BUG();
-
-       pfn = phys_addr >> PAGE_SHIFT;
-
-       pr_debug("    %s: pte %p address %lx size %lx phys_addr %lx\n",
-                __FUNCTION__,pte,address,size,phys_addr);
-
-       do {
-               if (!pte_none(*pte)) {
-                       printk("remap_area_pte: page already exists\n");
-                       BUG();
-               }
-
-               set_pte(pte, pfn_pte(pfn, pgprot));
-               address += PAGE_SIZE;
-               pfn++;
-               pte++;
-       } while (address && (address < end));
-}
-
-static inline int remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size,
-       unsigned long phys_addr, unsigned long flags)
-{
-       unsigned long end;
-
-       address &= ~PGDIR_MASK;
-       end = address + size;
-
-       if (end > PGDIR_SIZE)
-               end = PGDIR_SIZE;
-
-       phys_addr -= address;
-
-       if (address >= end)
-               BUG();
-
-       do {
-               pte_t * pte = pte_alloc_kernel(pmd, address);
-               if (!pte)
-                       return -ENOMEM;
-               remap_area_pte(pte, address, end - address, address + phys_addr, flags);
-               address = (address + PMD_SIZE) & PMD_MASK;
-               pmd++;
-       } while (address && (address < end));
-       return 0;
-}
-
-static int remap_area_pages(unsigned long address, unsigned long phys_addr,
-                                unsigned long size, unsigned long flags)
-{
-       int error;
-       pgd_t * dir;
-       unsigned long end = address + size;
-
-       phys_addr -= address;
-       dir = pgd_offset_k(address);
-       flush_cache_all();
-       if (address >= end)
-               BUG();
-       do {
-               pmd_t *pmd = pmd_alloc(&init_mm, dir, address);
-               error = -ENOMEM;
-               if (!pmd)
-                       break;
-               if (remap_area_pmd(pmd, address, end - address,
-                                  phys_addr + address, flags)) {
-                        break;
-               }
-               error = 0;
-               address = (address + PGDIR_SIZE) & PGDIR_MASK;
-               dir++;
-       } while (address && (address < end));
-       flush_tlb_all();
-       return 0;
-}
-
 /*
  * Generic mapping function (not visible outside):
  */
@@ -136,12 +47,17 @@ void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flag
        void * addr;
        struct vm_struct * area;
        unsigned long offset, last_addr;
+       pgprot_t pgprot;
 
        /* Don't allow wraparound or zero size */
        last_addr = phys_addr + size - 1;
        if (!size || last_addr < phys_addr)
                return NULL;
 
+       pgprot = __pgprot(_PAGE_PRESENT  | _PAGE_READ   |
+                         _PAGE_WRITE    | _PAGE_DIRTY  |
+                         _PAGE_ACCESSED | _PAGE_SHARED | flags);
+
        /*
         * Mappings have to be page-aligned
         */
@@ -158,12 +74,14 @@ void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flag
                return NULL;
        area->phys_addr = phys_addr;
        addr = area->addr;
-       if (remap_area_pages((unsigned long)addr, phys_addr, size, flags)) {
+       if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
+                              phys_addr, pgprot)) {
                vunmap(addr);
                return NULL;
        }
        return (void *) (offset + (char *)addr);
 }
+EXPORT_SYMBOL(__ioremap);
 
 void iounmap(void *addr)
 {
@@ -178,6 +96,7 @@ void iounmap(void *addr)
 
        kfree(area);
 }
+EXPORT_SYMBOL(iounmap);
 
 static struct resource shmedia_iomap = {
        .name   = "shmedia_iomap",
@@ -326,7 +245,7 @@ static void shmedia_free_io(struct resource *res)
        release_resource(res);
 }
 
-static void *sh64_get_page(void)
+static __init_refok void *sh64_get_page(void)
 {
        extern int after_bootmem;
        void *page;