690d9163bf
Some versions of GCC suboptimally generate calls to the __multi3()
intrinsic for MIPS64r6 builds, resulting in link failures due to the
missing function:
LD vmlinux.o
MODPOST vmlinux.o
kernel/bpf/verifier.o: In function `kmalloc_array':
include/linux/slab.h:631: undefined reference to `__multi3'
fs/select.o: In function `kmalloc_array':
include/linux/slab.h:631: undefined reference to `__multi3'
...
We already have a workaround for this in which we provide the
instrinsic, but we do so selectively for GCC 7 only. Unfortunately the
issue occurs with older GCC versions too - it has been observed with
both GCC 5.4.0 & GCC 6.4.0.
MIPSr6 support was introduced in GCC 5, so all major GCC versions prior
to GCC 8 are affected and we extend our workaround accordingly to all
MIPS64r6 builds using GCC versions older than GCC 8.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Reported-by: Vladimir Kondratiev <vladimir.kondratiev@intel.com>
Fixes:
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||
|---|---|---|
| .. | ||
| Makefile | ||
| bitops.c | ||
| bswapdi.c | ||
| bswapsi.c | ||
| csum_partial.S | ||
| delay.c | ||
| dump_tlb.c | ||
| iomap-pci.c | ||
| iomap.c | ||
| iomap_copy.c | ||
| libgcc.h | ||
| memcpy.S | ||
| memset.S | ||
| mips-atomic.c | ||
| multi3.c | ||
| r3k_dump_tlb.c | ||
| strncpy_user.S | ||
| strnlen_user.S | ||
| uncached.c | ||