Maciej W. Rozycki a8d2212538 MIPS: Fix the GCC version check for `__multi3' workaround ...

commit ec8bf18814 upstream.

It was only GCC 10 that fixed a MIPS64r6 code generation issue with a
`__multi3' libcall inefficiently produced to perform 64-bit widening
multiplication while suitable machine instructions exist to do such a
calculation.  The fix went in with GCC commit 48b2123f6336 ("re PR
target/82981 (unnecessary __multi3 call for mips64r6 linux kernel)").

Adjust our code accordingly, removing build failures such as:

mips64-linux-ld: lib/math/div64.o: in function `mul_u64_add_u64_div_u64':
div64.c:(.text+0x84): undefined reference to `__multi3'

with the GCC versions affected.

Fixes: ebabcf17bc ("MIPS: Implement __multi3 for GCC7 MIPS64r6 builds")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202601140146.hMLODc6v-lkp@intel.com/
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Cc: stable@vger.kernel.org # v4.15+
Reviewed-by: David Laight <david.laight.linux@gmail.com.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-04-11 14:24:41 +02:00

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bitops.c

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bswapdi.c

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bswapsi.c

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csum_partial.S

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delay.c

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dump_tlb.c

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iomap_copy.c

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iomap-pci.c

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libgcc.h

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Makefile

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memcpy.S

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memset.S

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mips-atomic.c

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multi3.c

MIPS: Fix the GCC version check for `__multi3' workaround

2026-04-11 14:24:41 +02:00

r3k_dump_tlb.c

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strncpy_user.S

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strnlen_user.S

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uncached.c

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