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| author | Nam Cao <namcaov@gmail.com> | 2023-07-25 07:38:35 +0200 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-08-31 00:18:25 -0700 |
| commit | 6b289a3ffa562070556ca66b766a88b1563d7759 (patch) | |
| tree | f86f556a558e1cf099324bc33e4fe1f6e63c2972 /arch | |
| parent | 7aa7d502e4d5a42353325cb4bf2aa880b10168e9 (diff) | |
| download | lwn-6b289a3ffa562070556ca66b766a88b1563d7759.tar.gz lwn-6b289a3ffa562070556ca66b766a88b1563d7759.zip | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/riscv/kernel/head.S | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S index 11c3b94c4534..3710ea5d160f 100644 --- a/arch/riscv/kernel/head.S +++ b/arch/riscv/kernel/head.S @@ -289,10 +289,6 @@ clear_bss: blt a3, a4, clear_bss clear_bss_done: #endif - /* Save hart ID and DTB physical address */ - mv s0, a0 - mv s1, a1 - la a2, boot_cpu_hartid XIP_FIXUP_OFFSET a2 REG_S a0, (a2) @@ -306,7 +302,7 @@ clear_bss_done: la a0, __dtb_start XIP_FIXUP_OFFSET a0 #else - mv a0, s1 + mv a0, a1 #endif /* CONFIG_BUILTIN_DTB */ call setup_vm #ifdef CONFIG_MMU |