[PATCH 2/2] x86/efi: Prevent mixed mode boot corruption with CONFIG_VMAP_STACK

2016-11-12 Thread Matt Fleming
Booting an EFI mixed mode kernel has been crashing since commit: e37e43a497d5 ("x86/mm/64: Enable vmapped stacks (CONFIG_HAVE_ARCH_VMAP_STACK=y)") The user-visible effect in my test setup was the kernel being unable to find the root file system ramdisk. This was likely caused by silent memory

[PATCH 2/2] x86/efi: Prevent mixed mode boot corruption with CONFIG_VMAP_STACK

2016-11-12 Thread Matt Fleming
Booting an EFI mixed mode kernel has been crashing since commit: e37e43a497d5 ("x86/mm/64: Enable vmapped stacks (CONFIG_HAVE_ARCH_VMAP_STACK=y)") The user-visible effect in my test setup was the kernel being unable to find the root file system ramdisk. This was likely caused by silent memory