The patch titled
Subject: efi: provide empty efi_enter_virtual_mode implementation
has been added to the -mm tree. Its filename is
efi-provide-empty-efi_enter_virtual_mode-implementation.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/efi-provide-empty-efi_enter_virtual_mode-implementation.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/efi-provide-empty-efi_enter_virtual_mode-implementation.patch
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------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: efi: provide empty efi_enter_virtual_mode implementation
When CONFIG_EFI is not enabled, we might get an undefined reference to
efi_enter_virtual_mode() error, if this efi_enabled() call isn't inlined
into start_kernel(). This happens in particular, if start_kernel() is
annodated with __no_sanitize_address.
Link: http://lkml.kernel.org/r/6514652d3a32d3ed33d6eb5c91d0af63bf0d1a0c.1596544734.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Elena Petrova <lenaptr@xxxxxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Cc: Walter Wu <walter-zh.wu@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/efi.h | 4 ++++
1 file changed, 4 insertions(+)
--- a/include/linux/efi.h~efi-provide-empty-efi_enter_virtual_mode-implementation
+++ a/include/linux/efi.h
@@ -606,7 +606,11 @@ extern void *efi_get_pal_addr (void);
extern void efi_map_pal_code (void);
extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
extern void efi_gettimeofday (struct timespec64 *ts);
+#ifdef CONFIG_EFI
extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
+#else
+static inline void efi_enter_virtual_mode (void) {}
+#endif
#ifdef CONFIG_X86
extern efi_status_t efi_query_variable_store(u32 attributes,
unsigned long size,
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
kasan-dont-tag-stacks-allocated-with-pagealloc.patch
efi-provide-empty-efi_enter_virtual_mode-implementation.patch
kasan-arm64-dont-instrument-functions-that-enable-kasan.patch
kasan-arm64-dont-instrument-functions-that-enable-kasan-v2.patch
kasan-allow-enabling-stack-tagging-for-tag-based-mode.patch
kasan-adjust-kasan_stack_oob-for-tag-based-mode.patch
