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Date: Wed, 5 Jan 2022 19:33:22 +0800
From: kernel test robot <lkp@...el.com>
To: Lukas Wunner <lukas@...ner.de>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org
Subject: [l1k:rs485_fixes 8/8] drivers/tty/serial/8250/8250_omap.c:327:2:
error: implicit declaration of function 'serial8250_set_mctrl'
tree: https://github.com/l1k/linux rs485_fixes
head: 5545dfa04324da44dd044c03e7c13a7d6066f47e
commit: 5545dfa04324da44dd044c03e7c13a7d6066f47e [8/8] serial: 8250: 8250_omap: Avoid rs485 RTS glitch on set_termios
config: riscv-buildonly-randconfig-r002-20220105 (https://download.01.org/0day-ci/archive/20220105/202201051919.S2AM5Jqq-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d5b6e30ed3acad794dd0aec400e617daffc6cc3d)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://github.com/l1k/linux/commit/5545dfa04324da44dd044c03e7c13a7d6066f47e
git remote add l1k https://github.com/l1k/linux
git fetch --no-tags l1k rs485_fixes
git checkout 5545dfa04324da44dd044c03e7c13a7d6066f47e
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/tty/serial/8250/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
In file included from drivers/tty/serial/8250/8250_omap.c:13:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:36:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from drivers/tty/serial/8250/8250_omap.c:13:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from drivers/tty/serial/8250/8250_omap.c:13:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
~~~~~~~~~~ ^
>> drivers/tty/serial/8250/8250_omap.c:327:2: error: implicit declaration of function 'serial8250_set_mctrl' [-Werror,-Wimplicit-function-declaration]
serial8250_set_mctrl(&up->port, up->port.mctrl);
^
drivers/tty/serial/8250/8250_omap.c:327:2: note: did you mean 'serial8250_do_set_mctrl'?
include/linux/serial_8250.h:167:13: note: 'serial8250_do_set_mctrl' declared here
extern void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl);
^
7 warnings and 1 error generated.
vim +/serial8250_set_mctrl +327 drivers/tty/serial/8250/8250_omap.c
290
291 static void omap8250_restore_regs(struct uart_8250_port *up)
292 {
293 struct omap8250_priv *priv = up->port.private_data;
294 struct uart_8250_dma *dma = up->dma;
295
296 if (dma && dma->tx_running) {
297 /*
298 * TCSANOW requests the change to occur immediately however if
299 * we have a TX-DMA operation in progress then it has been
300 * observed that it might stall and never complete. Therefore we
301 * delay DMA completes to prevent this hang from happen.
302 */
303 priv->delayed_restore = 1;
304 return;
305 }
306
307 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
308 serial_out(up, UART_EFR, UART_EFR_ECB);
309
310 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);
311 serial8250_out_MCR(up, serial8250_in_MCR(up) | UART_MCR_TCRTLR);
312 serial_out(up, UART_FCR, up->fcr);
313
314 omap8250_update_scr(up, priv);
315
316 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
317
318 serial_out(up, UART_TI752_TCR, OMAP_UART_TCR_RESTORE(16) |
319 OMAP_UART_TCR_HALT(52));
320 serial_out(up, UART_TI752_TLR,
321 TRIGGER_TLR_MASK(priv->tx_trigger) << UART_TI752_TLR_TX |
322 TRIGGER_TLR_MASK(priv->rx_trigger) << UART_TI752_TLR_RX);
323
324 serial_out(up, UART_LCR, 0);
325
326 /* drop TCR + TLR access, we setup XON/XOFF later */
> 327 serial8250_set_mctrl(&up->port, up->port.mctrl);
328 serial_out(up, UART_IER, up->ier);
329
330 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
331 serial_dl_write(up, priv->quot);
332
333 serial_out(up, UART_EFR, priv->efr);
334
335 /* Configure flow control */
336 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
337 serial_out(up, UART_XON1, priv->xon);
338 serial_out(up, UART_XOFF1, priv->xoff);
339
340 serial_out(up, UART_LCR, up->lcr);
341
342 omap8250_update_mdr1(up, priv);
343 }
344
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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