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Commit fb8722735f50 ("arm64: support __int128 on gcc 5+") added support
for the __int128 data type, but this breaks the build in some configurations
where GCC ends up emitting calls to the __lshrti3 helper in libgcc, which
results in a link error:
kernel/sched/fair.o: In function `__calc_delta':
fair.c:(.text+0xca0): undefined reference to `__lshrti3'
kernel/time/timekeeping.o: In function `timekeeping_resume':
timekeeping.c:(.text+0x3f60): undefined reference to `__lshrti3'
make: *** [vmlinux] Error 1
Fix the build by providing an implementation of __lshrti3, like we do
already for __ashlti3 and __ashrti3.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>