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MIPS: Hardcode cpu_has_mmips=1 for microMIPS kernels

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If we built the kernel targeting the microMIPS ISA then the very fact
that the kernel is running implies that the CPU supports microMIPS. Thus
we can hardcode cpu_has_mmips to 1 allowing the compiler greater scope
for optimisation due to the compile-time constant.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/21022/
Cc: linux-mips@linux-mips.org
This commit is contained in:
Paul Burton
2018-11-07 23:19:41 +00:00
parent d08b8ccc47
commit a013ba3928
1 changed files with 3 additions and 1 deletions
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4
arch/mips/include/asm/cpu-features.h
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@@ -195,7 +195,9 @@
#endif
#ifndef cpu_has_mmips
# ifdef CONFIG_SYS_SUPPORTS_MICROMIPS
# if defined(__mips_micromips)
# define cpu_has_mmips 1
# elif defined(CONFIG_SYS_SUPPORTS_MICROMIPS)
# define cpu_has_mmips __opt(MIPS_CPU_MICROMIPS)
# else
# define cpu_has_mmips 0