[tty:tty-next 8/33] arch/x86/platform/ce4100/ce4100.c:107:16: error: incompatible function pointer types assigning to 'u32 (*)(struct uart_port *, unsigned int)' (aka 'unsigned int (*)(struct uart_port *, unsigned int)') from 'unsigned int (struct uart_port *, int)'

[tty:tty-next 8/33] arch/x86/platform/ce4100/ce4100.c:107:16: error: incompatible function pointer types assigning to 'u32 (*)(struct uart_port *, unsigned int)' (aka 'unsigned int (*)(struct uart_port *, unsigned int)') from 'unsigned int (struct uart_port *, int)'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-next
head:   20ca8be9ad2e05015833b07f4325a398e614cf15
commit: fc9ceb501e38cc21066c1638993500b30eda8bdb [8/33] serial: 8250: sanitize uart_port::serial_{in,out}() types
config: i386-randconfig-007-20250619 (https://download.01.org/0day-ci/archive/20250619/202506190552.TqNasrC3-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250619/202506190552.TqNasrC3-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506190552.TqNasrC3-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/x86/platform/ce4100/ce4100.c:107:16: error: incompatible function pointer types assigning to 'u32 (*)(struct uart_port *, unsigned int)' (aka 'unsigned int (*)(struct uart_port *, unsigned int)') from 'unsigned int (struct uart_port *, int)' [-Wincompatible-function-pointer-types]
     107 |         up->serial_in = ce4100_mem_serial_in;
         |                       ^ ~~~~~~~~~~~~~~~~~~~~
>> arch/x86/platform/ce4100/ce4100.c:108:17: error: incompatible function pointer types assigning to 'void (*)(struct uart_port *, unsigned int, u32)' (aka 'void (*)(struct uart_port *, unsigned int, unsigned int)') from 'void (struct uart_port *, int, int)' [-Wincompatible-function-pointer-types]
     108 |         up->serial_out = ce4100_mem_serial_out;
         |                        ^ ~~~~~~~~~~~~~~~~~~~~~
   2 errors generated.


vim +107 arch/x86/platform/ce4100/ce4100.c

5ec6960f6f0c7b Dirk Brandewie 2010-11-22   81  
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   82  static void ce4100_serial_fixup(int port, struct uart_port *up,
a97673a1c43d00 Ingo Molnar    2018-12-03   83  	u32 *capabilities)
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   84  {
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   85  #ifdef CONFIG_EARLY_PRINTK
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   86  	/*
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   87  	 * Over ride the legacy port configuration that comes from
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   88  	 * asm/serial.h. Using the ioport driver then switching to the
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   89  	 * PCI memmaped driver hangs the IOAPIC
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   90  	 */
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   91  	if (up->iotype !=  UPIO_MEM32) {
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   92  		up->uartclk  = 14745600;
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   93  		up->mapbase = 0xdffe0200;
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   94  		set_fixmap_nocache(FIX_EARLYCON_MEM_BASE,
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   95  				up->mapbase & PAGE_MASK);
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   96  		up->membase =
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   97  			(void __iomem *)__fix_to_virt(FIX_EARLYCON_MEM_BASE);
5ec6960f6f0c7b Dirk Brandewie 2010-11-22   98  		up->membase += up->mapbase & ~PAGE_MASK;
08ec212c0f92cb Maxime Bizon   2012-10-19   99  		up->mapbase += port * 0x100;
08ec212c0f92cb Maxime Bizon   2012-10-19  100  		up->membase += port * 0x100;
5ec6960f6f0c7b Dirk Brandewie 2010-11-22  101  		up->iotype   = UPIO_MEM32;
5ec6960f6f0c7b Dirk Brandewie 2010-11-22  102  		up->regshift = 2;
08ec212c0f92cb Maxime Bizon   2012-10-19  103  		up->irq = 4;
5ec6960f6f0c7b Dirk Brandewie 2010-11-22  104  	}
5ec6960f6f0c7b Dirk Brandewie 2010-11-22  105  #endif
5ec6960f6f0c7b Dirk Brandewie 2010-11-22  106  	up->iobase = 0;
5ec6960f6f0c7b Dirk Brandewie 2010-11-22 @107  	up->serial_in = ce4100_mem_serial_in;
5ec6960f6f0c7b Dirk Brandewie 2010-11-22 @108  	up->serial_out = ce4100_mem_serial_out;
5ec6960f6f0c7b Dirk Brandewie 2010-11-22  109  
a97673a1c43d00 Ingo Molnar    2018-12-03  110  	*capabilities |= (1 << 12);
5ec6960f6f0c7b Dirk Brandewie 2010-11-22  111  }
5ec6960f6f0c7b Dirk Brandewie 2010-11-22  112  

:::::: The code at line 107 was first introduced by commit
:::::: 5ec6960f6f0c7be9cc6e5506fdf0070add3b6e08 ce4100: Add errata fixes for UART on CE4100

:::::: TO: Dirk Brandewie <dirk.brandewie@gmail.com>
:::::: CC: Thomas Gleixner <tglx@linutronix.de>

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