From: Andi Kleen <a...@linux.intel.com>
The stable backport of the
x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings
patch for 4.4 and 4.9 put new C code for !__HAVE_ARCH_PFN_MODIFY_ALLOWED
code outside the assembler ifdef. This breaks the xtensa and ia64
build as reported by 0day which somehow include this file
into assembler.
Just add an #ifdef __ASSEMBLY__ around the new code to fix this.
This patch is only needed for 4.9 and 4.4 stable, the newer stables
don't have this problem.
Fixes: 7c5b42f82c13 ("x86/speculation/l1tf: Disallow non privileged high MMIO
PROT_NONE mappings")
Signed-off-by: Andi Kleen <a...@linux.intel.com>
---
include/asm-generic/pgtable.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index a88ea9e37a25..abc2a1b15dd8 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -825,6 +825,7 @@ static inline int pmd_free_pte_page(pmd_t *pmd)
#endif
#endif
+#ifndef __ASSEMBLY__
struct file;
int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
unsigned long size, pgprot_t *vma_prot);
@@ -839,6 +840,9 @@ static inline bool arch_has_pfn_modify_check(void)
{
return false;
}
+
+#endif
+
#endif /* !_HAVE_ARCH_PFN_MODIFY_ALLOWED */
#endif /* !__ASSEMBLY__ */
--
2.17.1
