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authorJisheng Zhang <jszhang@kernel.org>2022-03-24 02:06:33 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-24 05:00:34 +0300
commitf05fa10901aa4b11a84257ecb7ac7f8fe7c4ee1b (patch)
tree738cb9b433fd834a7c68ba5fce701493fc90c530 /include/linux/kexec.h
parentb1e2c8df0f007f34c373925471c7b493c9e16620 (diff)
downloadlinux-f05fa10901aa4b11a84257ecb7ac7f8fe7c4ee1b.tar.xz
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@kernel.org Link: https://lkml.kernel.org/r/20211206160514.2000-2-jszhang@kernel.org Signed-off-by: Jisheng Zhang <jszhang@kernel.org> Acked-by: Baoquan He <bhe@redhat.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Palmer Dabbelt <palmer@rivosinc.com> Cc: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/kexec.h')
-rw-r--r--include/linux/kexec.h12
1 files changed, 6 insertions, 6 deletions
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 0c994ae37729..58d1b58a971e 100644
--- a/include/linux/kexec.h
+++ b/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;