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authorJason A. Donenfeld <Jason@zx2c4.com>2022-06-05 11:20:08 +0300
committerHuacai Chen <chenhuacai@loongson.cn>2022-06-08 06:00:40 +0300
commit5c95fe8b02011c3b69173e0d86aff6d4c2798601 (patch)
tree74bf90d2e500d7513d1cc6f228463808aede9c18 /arch/loongarch
parent0626e1c9f3e5536545431538d12c762d5abf59c8 (diff)
downloadlinux-5c95fe8b02011c3b69173e0d86aff6d4c2798601.tar.xz
LoongArch: Remove MIPS comment about cycle counter
This comment block was taken originally from the MIPS architecture code, where indeed there are particular assumptions one can make regarding SMP and !SMP and cycle counters. On LoongArch, however, the rdtime family of functions is always available. As Xuerui wrote: The rdtime family of instructions is in fact guaranteed to be available on LoongArch; LoongArch's subsets all contain them, even the 32-bit "Primary" subset intended for university teaching -- they provide the rdtimeh.w and rdtimel.w pair of instructions that access the same 64-bit counter. So this commit simply removes the incorrect comment block. Link: https://lore.kernel.org/lkml/e78940bc-9be2-2fe7-026f-9e64a1416c9f@xen0n.name/ Fixes: b738c106f735 ("LoongArch: Add other common headers") Reviewed-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch')
-rw-r--r--arch/loongarch/include/asm/timex.h7
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/loongarch/include/asm/timex.h b/arch/loongarch/include/asm/timex.h
index d3ed99a4fdbd..fb41e9e7a222 100644
--- a/arch/loongarch/include/asm/timex.h
+++ b/arch/loongarch/include/asm/timex.h
@@ -12,13 +12,6 @@
#include <asm/cpu.h>
#include <asm/cpu-features.h>
-/*
- * Standard way to access the cycle counter.
- * Currently only used on SMP for scheduling.
- *
- * We know that all SMP capable CPUs have cycle counters.
- */
-
typedef unsigned long cycles_t;
#define get_cycles get_cycles