Commit 33709413 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Rob Herring
Browse files

crash_dump: Make elfcorehdr address/size symbols always visible 



Make the forward declarations of elfcorehdr_addr and elfcorehdr_size,
and the definitions of ELFCORE_ADDR_MAX and ELFCORE_ADDR_ERR 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: default avatarRob Herring <robh+dt@kernel.org>
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/ba965ca613c0cc82c1ec2fe353ee34fb13b36474.1628670468.git.geert+renesas@glider.be
parent 0b381301

include/linux/crash_dump.h

+2 −1
Original line number Diff line number Diff line
@@ -10,13 +10,14 @@ 


#include <linux/pgtable.h> /* for pgprot_t */



#ifdef CONFIG_CRASH_DUMP

/* For IS_ENABLED(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;



#ifdef CONFIG_CRASH_DUMP

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);