Messages in this thread | | | Date | Thu, 18 Aug 2005 11:53:44 +0300 | From | Valentin Rabinovich <> | Subject | PROBLEM: mmap_kmem() |
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Bug in mmap_kmem(), drivers/char/mem.c. When mapping the kmem, page alingning seems to mess the address:
unsigned long long val; val = (u64)vma->vm_pgoff << PAGE_SHIFT; vma->vm_pgoff = ((unsigned long)val >> PAGE_SHIFT) - PAGE_OFFSET; vma->vm_pgoff = __pa(val) >> PAGE_SHIFT;
Subtracting 0xc0000000 and shifting is made in wrong order. Kernel: 2.6.12.3, 2.6.12.4
-- Valentin Rabinovich
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