* [PATCH] riscv: fix accessing 8-byte variable from RV32
@ 2019-03-22 6:37 Alan Kao
2019-03-22 13:34 ` Christoph Hellwig
0 siblings, 1 reply; 2+ messages in thread
From: Alan Kao @ 2019-03-22 6:37 UTC (permalink / raw)
To: linux-kernel, linux-riscv, palmer; +Cc: Alan Kao, Greentime Hu, Vincent Chen
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>
---
arch/riscv/include/asm/uaccess.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h
index a00168b..fb53a80 100644
--- 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" \
--
2.7.4
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2019-03-22 6:37 [PATCH] riscv: fix accessing 8-byte variable from RV32 Alan Kao
2019-03-22 13:34 ` Christoph Hellwig
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