riscv: fix accessing 8-byte variable from RV32
authorAlan Kao <alankao@andestech.com>
Fri, 22 Mar 2019 06:37:04 +0000 (14:37 +0800)
committerPalmer Dabbelt <palmer@sifive.com>
Wed, 27 Mar 2019 01:24:51 +0000 (18:24 -0700)
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<alankao@andestech.com>
Cc: Greentime Hu <greentime@andestech.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
arch/riscv/include/asm/uaccess.h

index a00168b980d2e6ca265ae0424045508275fbbe3f..fb53a8089e769473434493d59bc408079dcbb519 100644 (file)
@@ -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"                      \