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6cf09958f3
The main linker script vmlinux.lds.S for the kernel image merges
the expoline code patch tables into two section ".nospec_call_table"
and ".nospec_return_table". This is *not* done for the modules,
there the sections retain their original names as generated by gcc:
".s390_indirect_call", ".s390_return_mem" and ".s390_return_reg".
The module_finalize code has to check for the compiler generated
section names, otherwise no code patching is done. This slows down
the module code in case of "spectre_v2=off".
Cc: stable@vger.kernel.org # 4.16
Fixes:
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.. | ||
appldata | ||
boot | ||
configs | ||
crypto | ||
hypfs | ||
include | ||
kernel | ||
kvm | ||
lib | ||
mm | ||
net | ||
numa | ||
oprofile | ||
pci | ||
purgatory | ||
tools | ||
defconfig | ||
Kbuild | ||
Kconfig | ||
Kconfig.debug | ||
Makefile |