From: ak@suse.de (Andreas Kleen)
To: torvalds@osdl.org
Cc: linux-kernel@vger.kernel.org, akpm@osdl.org
Subject: [PATCH 5/17] Fix DRM to support 4level page tables
Date: Mon, 25 Oct 2004 09:23:49 +0200 [thread overview]
Message-ID: <417CAA05.mail3YH11FMWH@wotan.suse.de> (raw)
Fix DRM to support 4level page tables
Except for some ppc32 low level drivers DRM was the only code
in drivers that needed changes for 4levels.
Signed-off-by: Andi Kleen <ak@suse.de>
diff -urpN -X ../KDIFX linux-2.6.10rc1/drivers/char/drm/drm_memory.h linux-2.6.10rc1-4level/drivers/char/drm/drm_memory.h
--- linux-2.6.10rc1/drivers/char/drm/drm_memory.h 2004-10-19 01:55:10.000000000 +0200
+++ linux-2.6.10rc1-4level/drivers/char/drm/drm_memory.h 2004-10-25 04:48:10.000000000 +0200
@@ -121,10 +121,12 @@ agp_remap (unsigned long offset, unsigne
return addr;
}
+/* AK: looks racy */
static inline unsigned long
drm_follow_page (void *vaddr)
{
- pgd_t *pgd = pgd_offset_k((unsigned long) vaddr);
+ pml4_t *pml4 = pml4_offset_k((unsigned long) vaddr);
+ pgd_t *pgd = pml4_pgd_offset_k(pml4, (unsigned long) vaddr);
pmd_t *pmd = pmd_offset(pgd, (unsigned long) vaddr);
pte_t *ptep = pte_offset_kernel(pmd, (unsigned long) vaddr);
return pte_pfn(*ptep) << PAGE_SHIFT;
reply other threads:[~2004-10-25 7:29 UTC|newest]
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