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HACK: lib: Compile out nmi_backtrace for ARM64

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This silences the following compilation warning, presumably emitted
by llvm-ar in conjunction with Clang (Thin)LTO:

lib/nmi_backtrace.o: no symbols

This is a watchdog support library which is no-op on this
architecture, hence the empty object file, so let's avoid building
it entirely until a more aesthetically pleasing solution presents
itself.

Signed-off-by: Adam W. Willis <return.of.octobot@gmail.com>
Co-authored-by: Panchajanya1999 <panchajanya@azure-dev.live>
This commit is contained in:
Adam W. Willis 2021-01-02 22:47:44 -05:00 committed by spakkkk
parent c099ad7b62
commit 89d916cc45
1 changed files with 2 additions and 1 deletions
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3
lib/Makefile
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@ -35,8 +35,9 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
flex_proportions.o ratelimit.o show_mem.o \ flex_proportions.o ratelimit.o show_mem.o \
is_single_threaded.o plist.o decompress.o kobject_uevent.o \ is_single_threaded.o plist.o decompress.o kobject_uevent.o \
earlycpio.o seq_buf.o siphash.o dec_and_lock.o \ earlycpio.o seq_buf.o siphash.o dec_and_lock.o \
nmi_backtrace.o nodemask.o win_minmax.o nodemask.o win_minmax.o
lib-$(!CONFIG_ARM64) += nmi_backtrace.o
lib-$(CONFIG_PRINTK) += dump_stack.o lib-$(CONFIG_PRINTK) += dump_stack.o
lib-$(CONFIG_MMU) += ioremap.o lib-$(CONFIG_MMU) += ioremap.o
lib-$(CONFIG_SMP) += cpumask.o lib-$(CONFIG_SMP) += cpumask.o