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Message-ID: <20061004180010.GI26756@skybase>
Date: Wed, 4 Oct 2006 20:00:10 +0200
From: Martin Schwidefsky <schwidefsky@...ibm.com>
To: linux-kernel@...r.kernel.org, heiko.carstens@...ibm.com
Subject: [S390] Remove open-coded mem_map usage.
From: Heiko Carstens <heiko.carstens@...ibm.com>
[S390] Remove open-coded mem_map usage.
Use page_to_phys and pfn_to_page to avoid open-coded mem_map usage.
Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
---
arch/s390/mm/init.c | 10 ++++++----
include/asm-s390/io.h | 5 -----
include/asm-s390/page.h | 1 +
include/asm-s390/pgalloc.h | 2 +-
include/asm-s390/pgtable.h | 18 +++++++++---------
5 files changed, 17 insertions(+), 19 deletions(-)
diff -urpN linux-2.6/arch/s390/mm/init.c linux-2.6-patched/arch/s390/mm/init.c
--- linux-2.6/arch/s390/mm/init.c 2006-10-04 19:53:52.000000000 +0200
+++ linux-2.6-patched/arch/s390/mm/init.c 2006-10-04 19:53:52.000000000 +0200
@@ -62,19 +62,21 @@ void show_mem(void)
{
int i, total = 0, reserved = 0;
int shared = 0, cached = 0;
+ struct page *page;
printk("Mem-info:\n");
show_free_areas();
printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
i = max_mapnr;
while (i-- > 0) {
+ page = pfn_to_page(i);
total++;
- if (PageReserved(mem_map+i))
+ if (PageReserved(page))
reserved++;
- else if (PageSwapCache(mem_map+i))
+ else if (PageSwapCache(page))
cached++;
- else if (page_count(mem_map+i))
- shared += page_count(mem_map+i) - 1;
+ else if (page_count(page))
+ shared += page_count(page) - 1;
}
printk("%d pages of RAM\n",total);
printk("%d reserved pages\n",reserved);
diff -urpN linux-2.6/include/asm-s390/io.h linux-2.6-patched/include/asm-s390/io.h
--- linux-2.6/include/asm-s390/io.h 2006-10-04 19:53:37.000000000 +0200
+++ linux-2.6-patched/include/asm-s390/io.h 2006-10-04 19:53:52.000000000 +0200
@@ -45,11 +45,6 @@ static inline void * phys_to_virt(unsign
return __io_virt(address);
}
-/*
- * Change "struct page" to physical address.
- */
-#define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT)
-
extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
static inline void * ioremap (unsigned long offset, unsigned long size)
diff -urpN linux-2.6/include/asm-s390/page.h linux-2.6-patched/include/asm-s390/page.h
--- linux-2.6/include/asm-s390/page.h 2006-10-04 19:53:37.000000000 +0200
+++ linux-2.6-patched/include/asm-s390/page.h 2006-10-04 19:53:52.000000000 +0200
@@ -137,6 +137,7 @@ page_get_storage_key(unsigned long addr)
#define __pa(x) (unsigned long)(x)
#define __va(x) (void *)(unsigned long)(x)
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#define pfn_valid(pfn) ((pfn) < max_mapnr)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
diff -urpN linux-2.6/include/asm-s390/pgalloc.h linux-2.6-patched/include/asm-s390/pgalloc.h
--- linux-2.6/include/asm-s390/pgalloc.h 2006-10-04 19:53:37.000000000 +0200
+++ linux-2.6-patched/include/asm-s390/pgalloc.h 2006-10-04 19:53:52.000000000 +0200
@@ -116,7 +116,7 @@ pmd_populate_kernel(struct mm_struct *mm
static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
{
- pmd_populate_kernel(mm, pmd, (pte_t *)((page-mem_map) << PAGE_SHIFT));
+ pmd_populate_kernel(mm, pmd, (pte_t *)page_to_phys(page));
}
/*
diff -urpN linux-2.6/include/asm-s390/pgtable.h linux-2.6-patched/include/asm-s390/pgtable.h
--- linux-2.6/include/asm-s390/pgtable.h 2006-10-04 19:53:37.000000000 +0200
+++ linux-2.6-patched/include/asm-s390/pgtable.h 2006-10-04 19:53:52.000000000 +0200
@@ -599,7 +599,7 @@ ptep_establish(struct vm_area_struct *vm
*/
static inline int page_test_and_clear_dirty(struct page *page)
{
- unsigned long physpage = __pa((page - mem_map) << PAGE_SHIFT);
+ unsigned long physpage = page_to_phys(page);
int skey = page_get_storage_key(physpage);
if (skey & _PAGE_CHANGED)
@@ -612,13 +612,13 @@ static inline int page_test_and_clear_di
*/
static inline int page_test_and_clear_young(struct page *page)
{
- unsigned long physpage = __pa((page - mem_map) << PAGE_SHIFT);
+ unsigned long physpage = page_to_phys(page);
int ccode;
- asm volatile (
- "rrbe 0,%1\n"
- "ipm %0\n"
- "srl %0,28\n"
+ asm volatile(
+ " rrbe 0,%1\n"
+ " ipm %0\n"
+ " srl %0,28\n"
: "=d" (ccode) : "a" (physpage) : "cc" );
return ccode & 2;
}
@@ -636,7 +636,7 @@ static inline pte_t mk_pte_phys(unsigned
static inline pte_t mk_pte(struct page *page, pgprot_t pgprot)
{
- unsigned long physpage = __pa((page - mem_map) << PAGE_SHIFT);
+ unsigned long physpage = page_to_phys(page);
return mk_pte_phys(physpage, pgprot);
}
@@ -664,11 +664,11 @@ static inline pmd_t pfn_pmd(unsigned lon
#define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK)
-#define pmd_page(pmd) (mem_map+(pmd_val(pmd) >> PAGE_SHIFT))
+#define pmd_page(pmd) pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)
#define pgd_page_vaddr(pgd) (pgd_val(pgd) & PAGE_MASK)
-#define pgd_page(pgd) (mem_map+(pgd_val(pgd) >> PAGE_SHIFT))
+#define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
/* to find an entry in a page-table-directory */
#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
-
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