The patch titled
Subject: kexec: make crashk_res, crashk_low_res and crash_notes symbols always visible
has been added to the -mm tree. Its filename is
kexec-make-crashk_res-crashk_low_res-and-crash_notes-symbols-always-visible.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/kexec-make-crashk_res-crashk_low_res-and-crash_notes-symbols-always-visible.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/kexec-make-crashk_res-crashk_low_res-and-crash_notes-symbols-always-visible.patch
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------------------------------------------------------
From: Jisheng Zhang <jszhang@xxxxxxxxxx>
Subject: kexec: make crashk_res, crashk_low_res and crash_notes symbols always visible
Patch series "kexec: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef", v2.
Replace the conditional compilation using "#ifdef CONFIG_KEXEC_CORE" by a
check for "IS_ENABLED(CONFIG_KEXEC_CORE)", to simplify the code and
increase compile coverage.
I only modified x86, arm, arm64 and riscv, other architectures such as sh,
powerpc and s390 are better to be kept kexec code as-is so they are not
touched.
This patch (of 5):
Make the forward declarations of crashk_res, crashk_low_res and
crash_notes always visible. Code referring to these symbols can then just
check for IS_ENABLED(CONFIG_KEXEC_CORE), instead of requiring conditional
compilation using an #ifdef, thus preparing to increase compile coverage
and simplify the code.
Link: https://lkml.kernel.org/r/20211206160514.2000-1-jszhang@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20211206160514.2000-2-jszhang@xxxxxxxxxx
Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxx>
Acked-by: Baoquan He <bhe@xxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx>
Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Alexandre Ghiti <alex@xxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Cc: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/kexec.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--- a/include/linux/kexec.h~kexec-make-crashk_res-crashk_low_res-and-crash_notes-symbols-always-visible
+++ a/include/linux/kexec.h
@@ -20,6 +20,12 @@
#include <uapi/linux/kexec.h>
+/* Location of a reserved region to hold the crash kernel.
+ */
+extern struct resource crashk_res;
+extern struct resource crashk_low_res;
+extern note_buf_t __percpu *crash_notes;
+
#ifdef CONFIG_KEXEC_CORE
#include <linux/list.h>
#include <linux/compat.h>
@@ -350,12 +356,6 @@ extern int kexec_load_disabled;
#define KEXEC_FILE_FLAGS (KEXEC_FILE_UNLOAD | KEXEC_FILE_ON_CRASH | \
KEXEC_FILE_NO_INITRAMFS)
-/* Location of a reserved region to hold the crash kernel.
- */
-extern struct resource crashk_res;
-extern struct resource crashk_low_res;
-extern note_buf_t __percpu *crash_notes;
-
/* flag to track if kexec reboot is in progress */
extern bool kexec_in_progress;
_
Patches currently in -mm which might be from jszhang@xxxxxxxxxx are
kexec-make-crashk_res-crashk_low_res-and-crash_notes-symbols-always-visible.patch
riscv-mm-init-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch
x86-setup-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch
arm64-mm-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch
arm-use-is_enabledconfig_kexec_core-instead-of-ifdef.patch
