[PATCH v4 01/10] crash_dump: Make elfcorehdr_{addr,size} always visible
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: 2021-07-14 12:51:08
Also in:
kexec, linux-arm-kernel, linux-mm, linux-renesas-soc, linux-riscv, lkml
Subsystem:
kdump, the rest · Maintainers:
Andrew Morton, Baoquan He, Mike Rapoport, Pasha Tatashin, Pratyush Yadav, Linus Torvalds
Make the forward declarations of elfcorehdr_addr and elfcorehdr_size always available, like is done for phys_initrd_start and phys_initrd_size. Code referring to these symbols can then just check for IS_ENABLED(CONFIG_CRASH_DUMP), instead of requiring conditional compilation using an #ifdef, thus preparing to increase compile coverage. Suggested-by: Rob Herring <robh+dt@kernel.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- v4: - New. --- include/linux/crash_dump.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h
index a5192b718dbe4f9a..ad31893d13d634de 100644
--- a/include/linux/crash_dump.h
+++ b/include/linux/crash_dump.h@@ -10,13 +10,14 @@ #include <linux/pgtable.h> /* for pgprot_t */ +/* For IS_ENABLED(CONFIG_CRASH_DUMP) */ +extern unsigned long long elfcorehdr_addr; +extern unsigned long long elfcorehdr_size; + #ifdef CONFIG_CRASH_DUMP #define ELFCORE_ADDR_MAX (-1ULL) #define ELFCORE_ADDR_ERR (-2ULL) -extern unsigned long long elfcorehdr_addr; -extern unsigned long long elfcorehdr_size; - extern int elfcorehdr_alloc(unsigned long long *addr, unsigned long long *size); extern void elfcorehdr_free(unsigned long long addr); extern ssize_t elfcorehdr_read(char *buf, size_t count, u64 *ppos);
--
2.25.1