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| author | Takashi Iwai <tiwai@suse.de> | 2016-03-08 09:49:43 (GMT) |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2016-03-08 09:49:43 (GMT) |
| commit | 56d94d70398f0fbb1863a03a145db1a86f009a71 (patch) | |
| tree | 9e52dc537f8f8359c70b66f5000192bb280b41b9 /arch/x86/mm/pageattr.c | |
| parent | bb63f726f98bec032c7322a9c36eb4167307d856 (diff) | |
| parent | fc4f000bf8c0cbf38f44de6bd5e225574e572ed4 (diff) | |
| download | linux-56d94d70398f0fbb1863a03a145db1a86f009a71.tar.xz | |
Merge branch 'topic/hda' into for-next
Diffstat (limited to 'arch/x86/mm/pageattr.c')
| -rw-r--r-- | arch/x86/mm/pageattr.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index 2440814..9cf96d8 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -419,24 +419,30 @@ pmd_t *lookup_pmd_address(unsigned long address) phys_addr_t slow_virt_to_phys(void *__virt_addr) { unsigned long virt_addr = (unsigned long)__virt_addr; - unsigned long phys_addr, offset; + phys_addr_t phys_addr; + unsigned long offset; enum pg_level level; pte_t *pte; pte = lookup_address(virt_addr, &level); BUG_ON(!pte); + /* + * pXX_pfn() returns unsigned long, which must be cast to phys_addr_t + * before being left-shifted PAGE_SHIFT bits -- this trick is to + * make 32-PAE kernel work correctly. + */ switch (level) { case PG_LEVEL_1G: - phys_addr = pud_pfn(*(pud_t *)pte) << PAGE_SHIFT; + phys_addr = (phys_addr_t)pud_pfn(*(pud_t *)pte) << PAGE_SHIFT; offset = virt_addr & ~PUD_PAGE_MASK; break; case PG_LEVEL_2M: - phys_addr = pmd_pfn(*(pmd_t *)pte) << PAGE_SHIFT; + phys_addr = (phys_addr_t)pmd_pfn(*(pmd_t *)pte) << PAGE_SHIFT; offset = virt_addr & ~PMD_PAGE_MASK; break; default: - phys_addr = pte_pfn(*pte) << PAGE_SHIFT; + phys_addr = (phys_addr_t)pte_pfn(*pte) << PAGE_SHIFT; offset = virt_addr & ~PAGE_MASK; } |