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riscv: remove redundant mv instructions 

Some mv instructions were useful when first introduced to preserve a0 and
a1 before function calls. However the code has changed and they are now
redundant. Remove them.

Signed-off-by: Nam Cao <namcaov@gmail.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20230725053835.138910-1-namcaov@gmail.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Nam Cao 2023-07-25 07:38:35 +02:00 committed by Palmer Dabbelt
parent 7aa7d502e4
commit 6b289a3ffa
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1 changed files with 1 additions and 5 deletions
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arch/riscv/kernel/head.S
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@ -289,10 +289,6 @@ clear_bss:
blt a3, a4, clear_bss blt a3, a4, clear_bss
clear_bss_done: clear_bss_done:
#endif #endif
/* Save hart ID and DTB physical address */
mv s0, a0
mv s1, a1
la a2, boot_cpu_hartid la a2, boot_cpu_hartid
XIP_FIXUP_OFFSET a2 XIP_FIXUP_OFFSET a2
REG_S a0, (a2) REG_S a0, (a2)
@ -306,7 +302,7 @@ clear_bss_done:
la a0, __dtb_start la a0, __dtb_start
XIP_FIXUP_OFFSET a0 XIP_FIXUP_OFFSET a0
#else #else
mv a0, s1 mv a0, a1
#endif /* CONFIG_BUILTIN_DTB */ #endif /* CONFIG_BUILTIN_DTB */
call setup_vm call setup_vm
#ifdef CONFIG_MMU #ifdef CONFIG_MMU