serial: sh-sci: Prevent compiler warnings on 64-bit

Expressions involving "BIT(...)" create values of type "long", which is
64-bit on 64-bit.  Hence "~BIT(...)" no longer fits in 32-bit, which
will cause future compiler warnings when assigning to 32-bit variables:

    drivers/tty/serial/sh-sci.c: In function 'sci_init_single':
    drivers/tty/serial/sh-sci.h:58:25: warning: large integer implicitly truncated to unsigned type [-Woverflow]
     #define SCI_ERROR_CLEAR ~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER)
			     ^
    drivers/tty/serial/sh-sci.c:2325:27: note: in expansion of macro 'SCI_ERROR_CLEAR'
       sci_port->error_clear = SCI_ERROR_CLEAR;

As these values are (at most) 32-bit register values anyway, cast them
to "u32" at the definition level to prevent such compiler warnings.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h
index 1e1edbd152673e8fc99417fee5d685d0b441036a..fe7108bc022a495a3e17b21cb44f10f0e000fc29 100644 (file)
--- a/drivers/tty/serial/sh-sci.h
+++ b/drivers/tty/serial/sh-sci.h
@@ -54,10 +54,10 @@ enum {
 
 #define SCI_DEFAULT_ERROR_MASK (SCI_PER | SCI_FER)
 
-#define SCI_RDxF_CLEAR ~(SCI_RESERVED | SCI_RDRF)
-#define SCI_ERROR_CLEAR        ~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER)
-#define SCI_TDxE_CLEAR ~(SCI_RESERVED | SCI_TEND | SCI_TDRE)
-#define SCI_BREAK_CLEAR        ~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER)
+#define SCI_RDxF_CLEAR (u32)(~(SCI_RESERVED | SCI_RDRF))
+#define SCI_ERROR_CLEAR        (u32)(~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER))
+#define SCI_TDxE_CLEAR (u32)(~(SCI_RESERVED | SCI_TEND | SCI_TDRE))
+#define SCI_BREAK_CLEAR        (u32)(~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER))
 
 /* SCxSR (Serial Status Register) on SCIF, SCIFA, SCIFB, HSCIF */
 #define SCIF_ER                BIT(7)  /* Receive Error */
@@ -76,10 +76,10 @@ enum {
 
 #define SCIF_DEFAULT_ERROR_MASK (SCIF_PER | SCIF_FER | SCIF_BRK | SCIF_ER)
 
-#define SCIF_RDxF_CLEAR                ~(SCIF_DR | SCIF_RDF)
-#define SCIF_ERROR_CLEAR       ~(SCIFA_ORER | SCIF_PER | SCIF_FER | SCIF_ER)
-#define SCIF_TDxE_CLEAR                ~(SCIF_TDFE)
-#define SCIF_BREAK_CLEAR       ~(SCIF_PER | SCIF_FER | SCIF_BRK)
+#define SCIF_RDxF_CLEAR                (u32)(~(SCIF_DR | SCIF_RDF))
+#define SCIF_ERROR_CLEAR       (u32)(~(SCIFA_ORER | SCIF_PER | SCIF_FER | SCIF_ER))
+#define SCIF_TDxE_CLEAR                (u32)(~(SCIF_TDFE))
+#define SCIF_BREAK_CLEAR       (u32)(~(SCIF_PER | SCIF_FER | SCIF_BRK))
 
 /* SCFCR (FIFO Control Register) */
 #define SCFCR_MCE      BIT(3)  /* Modem Control Enable */