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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-02-05 16:50:37 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-02-05 16:50:54 +0100 |
| commit | 2485579bf5d3ea30d39b251defa1620ad77168bd (patch) | |
| tree | ef07e9e793f7f73d69b21c539ad96d5346787182 /arch/s390/mm | |
| parent | [S390] cio: Add shutdown callback for ccwgroup. (diff) | |
| download | linux-2485579bf5d3ea30d39b251defa1620ad77168bd.tar.xz linux-2485579bf5d3ea30d39b251defa1620ad77168bd.zip | |
[S390] DEBUG_PAGEALLOC support for s390.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/init.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index b234bb4a6da7..983ec6ec0e7c 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -167,6 +167,33 @@ void __init mem_init(void) PFN_ALIGN((unsigned long)&_eshared) - 1); } +#ifdef CONFIG_DEBUG_PAGEALLOC +void kernel_map_pages(struct page *page, int numpages, int enable) +{ + pgd_t *pgd; + pud_t *pud; + pmd_t *pmd; + pte_t *pte; + unsigned long address; + int i; + + for (i = 0; i < numpages; i++) { + address = page_to_phys(page + i); + pgd = pgd_offset_k(address); + pud = pud_offset(pgd, address); + pmd = pmd_offset(pud, address); + pte = pte_offset_kernel(pmd, address); + if (!enable) { + ptep_invalidate(address, pte); + continue; + } + *pte = mk_pte_phys(address, __pgprot(_PAGE_TYPE_RW)); + /* Flush cpu write queue. */ + mb(); + } +} +#endif + void free_initmem(void) { unsigned long addr; |