xtensa: properly fix missing compiler barrier in simcall (288dc2b6) · Commits · 戴 / test

arch/xtensa/platforms/iss/include/platform/simcall.h

+1 −6

Original line number	Diff line number	Diff line
		@@ -74,13 +74,12 @@ static inline int __simc(int a, int b, int c, int d, int e, int f)
		"mov %1, a3\n"
		: "=a" (ret), "=a" (errno), "+r"(a1), "+r"(b1)
		: "r"(c1), "r"(d1), "r"(e1), "r"(f1)
		: );
		: "memory");
		return ret;
		}

		static inline int simc_open(const char *file, int flags, int mode)
		{
		wmb();
		return __simc(SYS_open, (int) file, flags, mode, 0, 0);
		}

		@@ -91,19 +90,16 @@ static inline int simc_close(int fd)

		static inline int simc_ioctl(int fd, int request, void *arg)
		{
		wmb();
		return __simc(SYS_ioctl, fd, request, (int) arg, 0, 0);
		}

		static inline int simc_read(int fd, void *buf, size_t count)
		{
		rmb();
		return __simc(SYS_read, fd, (int) buf, count, 0, 0);
		}

		static inline int simc_write(int fd, const void *buf, size_t count)
		{
		wmb();
		return __simc(SYS_write, fd, (int) buf, count, 0, 0);
		}

		@@ -111,7 +107,6 @@ static inline int simc_poll(int fd)
		{
		struct timeval tv = { .tv_sec = 0, .tv_usec = 0 };

		wmb();
		return __simc(SYS_select_one, fd, XTISS_SELECT_ONE_READ, (int)&tv,
		0, 0);
		}