On Wed, Aug 15, 2018 at 02:56:46PM -0700, Andi Kleen wrote:
From: Andi Kleen ak@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 ak@linux.intel.com
This should be fixed in the final stable releases. The problem was caused by a couple of missing backports.
Guenter