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riscv: fpu: drop SR_SD bit checking

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SR_SD summarizes the dirty status of FS/VS/XS. However, the current code
structure does not fully utilize it because each extension specific code
is divided into an individual segment. So remove the SR_SD check for
now.

Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Song Shuai <songshuaishuai@tinylab.org>
Reviewed-by: Guo Ren <guoren@kernel.org>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20240115055929.4736-7-andy.chiu@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Andy Chiu 2024-01-15 05:59:25 +00:00 committed by Palmer Dabbelt
parent c2a658d419
commit a93fdaf183
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1 changed files with 1 additions and 2 deletions
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3
arch/riscv/include/asm/switch_to.h
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@ -53,8 +53,7 @@ static inline void __switch_to_fpu(struct task_struct *prev,
struct pt_regs *regs;
regs = task_pt_regs(prev);
if (unlikely(regs->status & SR_SD))
fstate_save(prev, regs);
fstate_save(prev, regs);
fstate_restore(next, task_pt_regs(next));
}