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linux/arch/mips/lib
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Maciej W. Rozycki 01f525cca2 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>
History 2026-04-18 10:33:32 +02:00
..
bitops.c MIPS: bitops: Use BIT_WORD() & BITS_PER_LONG 2019-10-07 09:42:55 -07:00
bswapdi.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bswapsi.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
csum_partial.S MIPS: Fix build error due to PTR used in more places 2022-02-16 12:56:16 +01:00
delay.c MIPS: do not compile generic functions for CONFIG_CAVIUM_OCTEON_SOC 2020-03-25 16:07:13 +01:00
dump_tlb.c treewide: Remove uninitialized_var() usage 2020-07-16 12:35:15 -07:00
iomap-pci.c arch: mips: update references to current linux-mips list 2021-02-23 13:24:38 +01:00
iomap_copy.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 504 2019-06-19 17:09:56 +02:00
libgcc.h MIPS: Implement __multi3 for GCC7 MIPS64r6 builds 2018-01-11 14:40:31 +01:00
Makefile MIPS: Use GENERIC_IOMAP 2018-08-30 09:41:16 -07:00
memcpy.S MIPS: Fix build error due to PTR used in more places 2022-02-16 12:56:16 +01:00
memset.S MIPS: Fix build error due to PTR used in more places 2022-02-16 12:56:16 +01:00
mips-atomic.c MIPS: Fix kernel hang under FUNCTION_GRAPH_TRACER and PREEMPT_TRACER 2021-05-25 15:33:17 +02:00
multi3.c MIPS: Fix the GCC version check for `__multi3' workaround 2026-04-18 10:33:32 +02:00
r3k_dump_tlb.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
strncpy_user.S MIPS: Fix build error due to PTR used in more places 2022-02-16 12:56:16 +01:00
strnlen_user.S MIPS: Fix build error due to PTR used in more places 2022-02-16 12:56:16 +01:00
uncached.c mips: lib: uncached: fix non-standard usage of variable 'sp' 2020-12-14 16:03:11 +01:00