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Commit 2ccaac38 authored by Vincenzo Frascino's avatar Vincenzo Frascino Committed by Greg Kroah-Hartman
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ARM: 8951/1: Fix Kexec compilation issue. 



[ Upstream commit 76950f7162cad51d2200ebd22c620c14af38f718 ]

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);
                         ^~~~~~~~~~~~
                         SECTIONS_WIDTH
  linux/arch/arm/kernel/setup.c:1016:25: note: each undeclared identifier
     is reported only once for each function it appears in
  linux/scripts/Makefile.build:265: recipe for target 'arch/arm/kernel/setup.o'
     failed

Make KEXEC depend on MMU to fix the compilation issue.

Signed-off-by: default avatarVincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 16ec2864

arch/arm/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -1907,7 +1907,7 @@ config XIP_DEFLATED_DATA 
config KEXEC

	bool "Kexec system call (EXPERIMENTAL)"

	depends on (!SMP || PM_SLEEP_SMP)

	depends on !CPU_V7M

	depends on MMU

	select KEXEC_CORE

	help

	  kexec is a system call that implements the ability to shutdown your