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ARM: 8752/1: Kconfig: default ARM_MODULE_PLTS to 'y'

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While testing multi_v7_defconfig with config fragments that makes the
kernel size to grow. The kernel fails to load simple modules, as
reported by kselftest:

[   34.107620] test_printf: section 4 reloc 2 sym 'memset': relocation
28 out of range (0xbf046044 -> 0xc109f720)
selftests: printf.sh [FAIL]

The problem that is seen when enabling too much in the kernel without
enabling ARM_MODULE_PLTS, is that the top of the kernel gets out of
reach from the bottom of the module area.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Anders Roxell 2018-03-26 14:54:25 +01:00 committed by Russell King
parent 60cc43fc88
commit e7229f7db9
1 changed files with 3 additions and 1 deletions
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arch/arm/Kconfig
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@ -1704,6 +1704,7 @@ config ARCH_WANT_GENERAL_HUGETLB
config ARM_MODULE_PLTS
bool "Use PLTs to allow module memory to spill over into vmalloc area"
depends on MODULES
default y
help
Allocate PLTs when loading modules so that jumps and calls whose
targets are too far away for their relative offsets to be encoded
@ -1714,7 +1715,8 @@ config ARM_MODULE_PLTS
rounding up to page size, the actual memory footprint is usually
the same.
Say y if you are getting out of memory errors while loading modules
Disabling this is usually safe for small single-platform
configurations. If unsure, say y.
source "mm/Kconfig"