riscv: fix accessing 8-byte variable from RV32

NonerKao · palmer-dabbelt · commit dbee9c9c4584 · 2019-03-26T18:24:51.000-07:00
A memory save operation to 8-byte variable in RV32 is divided into
two sw instructions in the put_user macro.  The current fixup returns
execution flow to the second sw instead of the one after it.

This patch fixes this fixup code according to the load access part.

Signed-off-by: Alan Kao&lt;alankao@andestech.com&gt;
Cc: Greentime Hu &lt;greentime@andestech.com&gt;
Cc: Vincent Chen &lt;deanbo422@gmail.com&gt;
Signed-off-by: Palmer Dabbelt &lt;palmer@sifive.com&gt;
diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h
@@ -300,7 +300,7 @@ do {								\
 		"	.balign 4\n"				\
 		"4:\n"						\
 		"	li %0, %6\n"				\
-		"	jump 2b, %1\n"				\
+		"	jump 3b, %1\n"				\
 		"	.previous\n"				\
 		"	.section __ex_table,\"a\"\n"		\
 		"	.balign " RISCV_SZPTR "\n"			\
