crypto: hisilicon/qm: Fix to enable build with RISC-V clang

With CONFIG_ACPI enabled for RISC-V, this driver gets enabled in
allmodconfig build. However, build fails with clang and below
error is seen.

drivers/crypto/hisilicon/qm.c:627:10: error: invalid output constraint '+Q' in asm
                       "+Q" (*((char __iomem *)fun_base))
                       ^
This is expected error with clang due to the way it is designed.

To fix this issue, move arm64 assembly code under #if.

Link: https://github.com/ClangBuiltLinux/linux/issues/999
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
[sunilvl@ventanamicro.com: Moved tmp0 and tmp1 into the #if]
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Link: https://lore.kernel.org/r/20230515054928.2079268-4-sunilvl@ventanamicro.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index ad0c042..edc6fd4 100644 (file)
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -610,7 +610,10 @@ EXPORT_SYMBOL_GPL(hisi_qm_wait_mb_ready);
 static void qm_mb_write(struct hisi_qm *qm, const void *src)
 {
        void __iomem *fun_base = qm->io_base + QM_MB_CMD_SEND_BASE;
+
+#if IS_ENABLED(CONFIG_ARM64)
        unsigned long tmp0 = 0, tmp1 = 0;
+#endif
 
        if (!IS_ENABLED(CONFIG_ARM64)) {
                memcpy_toio(fun_base, src, 16);
@@ -618,6 +621,7 @@ static void qm_mb_write(struct hisi_qm *qm, const void *src)
                return;
        }
 
+#if IS_ENABLED(CONFIG_ARM64)
        asm volatile("ldp %0, %1, %3\n"
                     "stp %0, %1, %2\n"
                     "dmb oshst\n"
@@ -626,6 +630,7 @@ static void qm_mb_write(struct hisi_qm *qm, const void *src)
                       "+Q" (*((char __iomem *)fun_base))
                     : "Q" (*((char *)src))
                     : "memory");
+#endif
 }
 
 static int qm_mb_nolock(struct hisi_qm *qm, struct qm_mailbox *mailbox)