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[v5,2/9] crash_dump: Make elfcorehdr address/size symbols always visible

Message ID ba965ca613c0cc82c1ec2fe353ee34fb13b36474.1628670468.git.geert+renesas@glider.be (mailing list archive)
State Accepted
Delegated to: Geert Uytterhoeven
Headers show
Series Add generic support for kdump DT properties | expand

Commit Message

Geert Uytterhoeven Aug. 11, 2021, 8:51 a.m. UTC 
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: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v5:
  - Make ELFCORE_ADDR_{MAX,ERR} visible, too,

v4:
  - New.
---
 include/linux/crash_dump.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h
index a5192b718dbe4f9a..2618577a4d6da77e 100644
--- a/include/linux/crash_dump.h
+++ b/include/linux/crash_dump.h
@@ -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);