Unverified Commit f1905946 authored by Xiao Wang's avatar Xiao Wang Committed by Palmer Dabbelt
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riscv: uaccess: Allow the last potential unrolled copy 



When the dst buffer pointer points to the last accessible aligned addr, we
could still run another iteration of unrolled copy.

Signed-off-by: default avatarXiao Wang <xiao.w.wang@intel.com>
Reviewed-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240313103334.4036554-1-xiao.w.wang@intel.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent 7e6eae24

arch/riscv/lib/uaccess.S

+1 −1
Original line number Diff line number Diff line
@@ -103,7 +103,7 @@ SYM_FUNC_START(fallback_scalar_usercopy) 
	fixup REG_S   t4,  7*SZREG(a0), 10f

	addi	a0, a0, 8*SZREG

	addi	a1, a1, 8*SZREG

	bltu	a0, t0, 2b

	bleu	a0, t0, 2b



	addi	t0, t0, 8*SZREG /* revert to original value */

	j	.Lbyte_copy_tail