[lkml]   [2020]   [Jan]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH] arm: Fix Kexec compilation issue.
To perform the reserve_crashkernel() operation kexec uses SECTION_SIZE to
find a memblock in a range.
SECTION_SIZE is not defined for nommu systems. Trying to compile kexec in
these conditions results in a build error:

linux/arch/arm/kernel/setup.c: In function ‘reserve_crashkernel’:
linux/arch/arm/kernel/setup.c:1016:25: error: ‘SECTION_SIZE’ undeclared
(first use in this function); did you mean ‘SECTIONS_WIDTH’?
crash_size, SECTION_SIZE);
linux/arch/arm/kernel/setup.c:1016:25: note: each undeclared identifier
is reported only once for each function it appears in
linux/scripts/ recipe for target 'arch/arm/kernel/setup.o'

Make KEXEC depend on MMU to fix the compilation issue.

Cc: Russell King <>
Signed-off-by: Vincenzo Frascino <>
arch/arm/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ba75e3661a41..bc99582bdc85 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1904,7 +1904,7 @@ config XIP_DEFLATED_DATA
config KEXEC
bool "Kexec system call (EXPERIMENTAL)"
depends on (!SMP || PM_SLEEP_SMP)
- depends on !CPU_V7M
+ depends on MMU
kexec is a system call that implements the ability to shutdown your
 \ /
  Last update: 2020-01-10 13:32    [W:0.036 / U:5.740 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site