[PATCH 2/2] relocate_to_current_adr: hang directly on error instead of panic()

[Ahmad Fatoum]

panic() will format a panic message, turn on a panic LED, dump a
stack trace and finally either restart the system or print a
message to ask the user to restart the system before hanging.

When relocation fails, all of these aren't possible, so instead of
devolving into undefined behavior, fall directly into an infinite loop.

Motivation for this change is to avoid linking printf code when it's
only usage is the relocation error case.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 arch/arm/cpu/common.c  | 4 ++--
 arch/riscv/lib/reloc.c | 2 +-
 include/common.h       | 6 ++++++
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/arm/cpu/common.c b/arch/arm/cpu/common.c
index 5ccacf204751..7cd97e938b3d 100644
--- a/arch/arm/cpu/common.c
+++ b/arch/arm/cpu/common.c
@@ -90,7 +90,7 @@ void relocate_to_current_adr(void)
 			putc_ll(' ');
 			puthex_ll(rel->r_addend);
 			putc_ll('\n');
-			panic("");
+			__hang();
 		}
 
 		dstart += sizeof(*rel);
@@ -120,7 +120,7 @@ void relocate_to_current_adr(void)
 			putc_ll(' ');
 			puthex_ll(rel->r_offset);
 			putc_ll('\n');
-			panic("");
+			__hang();
 		}
 
 		dstart += sizeof(*rel);
diff --git a/arch/riscv/lib/reloc.c b/arch/riscv/lib/reloc.c
index da53c50448d7..13118a9ac54f 100644
--- a/arch/riscv/lib/reloc.c
+++ b/arch/riscv/lib/reloc.c
@@ -66,7 +66,7 @@ void relocate_to_current_adr(void)
 			putc_ll(' ');
 			puthex_ll(rela->r_addend);
 			putc_ll('\n');
-			panic("");
+			__hang();
 		}
 	}
 
diff --git a/include/common.h b/include/common.h
index bd120356883a..cf3e0447a09a 100644
--- a/include/common.h
+++ b/include/common.h
@@ -43,6 +43,12 @@
  */
 void reginfo(void);
 
+/* For use when unrelocated */
+static inline void __hang(void)
+{
+	while (1);
+}
+
 void __noreturn hang (void);
 
 char *size_human_readable(unsigned long long size);
-- 
2.30.2