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drivers/gpio/gpio-mpc8xxx.c:373:2: error: implicit declaration of function 'iounmap'

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Hi,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   da2f6aba4a21f8da3331e5251a117c52764da579
commit: 296ad4acb8efeffa456e344c73dc9459f4e9e1a0 gpio: remove deps on ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB
date:   9 weeks ago
config: um-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        git checkout 296ad4acb8efeffa456e344c73dc9459f4e9e1a0
        # save the attached .config to linux build tree
        make ARCH=um 

All errors (new ones prefixed by >>):

   drivers/gpio/gpio-mpc8xxx.c: In function 'mpc8xxx_probe':
>> drivers/gpio/gpio-mpc8xxx.c:373:2: error: implicit declaration of function 'iounmap' [-Werror=implicit-function-declaration]
     iounmap(mpc8xxx_gc->regs);
     ^~~~~~~
   cc1: some warnings being treated as errors

vim +/iounmap +373 drivers/gpio/gpio-mpc8xxx.c

42178e2a1e drivers/gpio/gpio-mpc8xxx.c        Liu Gang                2016-02-03  357  	if (!mpc8xxx_gc->irqn)
98686d9a52 drivers/gpio/gpio-mpc8xxx.c        Ricardo Ribalda Delgado 2015-01-18  358  		return 0;
345e5c8a1c arch/powerpc/sysdev/mpc8xxx_gpio.c Peter Korsgaard         2010-01-07  359  
a8db8cf0d8 drivers/gpio/gpio-mpc8xxx.c        Grant Likely            2012-02-14  360  	mpc8xxx_gc->irq = irq_domain_add_linear(np, MPC8XXX_GPIO_PINS,
a8db8cf0d8 drivers/gpio/gpio-mpc8xxx.c        Grant Likely            2012-02-14  361  					&mpc8xxx_gpio_irq_ops, mpc8xxx_gc);
345e5c8a1c arch/powerpc/sysdev/mpc8xxx_gpio.c Peter Korsgaard         2010-01-07  362  	if (!mpc8xxx_gc->irq)
98686d9a52 drivers/gpio/gpio-mpc8xxx.c        Ricardo Ribalda Delgado 2015-01-18  363  		return 0;
345e5c8a1c arch/powerpc/sysdev/mpc8xxx_gpio.c Peter Korsgaard         2010-01-07  364  
345e5c8a1c arch/powerpc/sysdev/mpc8xxx_gpio.c Peter Korsgaard         2010-01-07  365  	/* ack and mask all irqs */
cd0d3f58a0 drivers/gpio/gpio-mpc8xxx.c        Axel Lin                2016-02-22  366  	gc->write_reg(mpc8xxx_gc->regs + GPIO_IER, 0xffffffff);
cd0d3f58a0 drivers/gpio/gpio-mpc8xxx.c        Axel Lin                2016-02-22  367  	gc->write_reg(mpc8xxx_gc->regs + GPIO_IMR, 0);
345e5c8a1c arch/powerpc/sysdev/mpc8xxx_gpio.c Peter Korsgaard         2010-01-07  368  
05379818e4 drivers/gpio/gpio-mpc8xxx.c        Thomas Gleixner         2015-06-21  369  	irq_set_chained_handler_and_data(mpc8xxx_gc->irqn,
05379818e4 drivers/gpio/gpio-mpc8xxx.c        Thomas Gleixner         2015-06-21  370  					 mpc8xxx_gpio_irq_cascade, mpc8xxx_gc);
257e10752c drivers/gpio/gpio-mpc8xxx.c        Ricardo Ribalda Delgado 2015-01-18  371  	return 0;
42178e2a1e drivers/gpio/gpio-mpc8xxx.c        Liu Gang                2016-02-03  372  err:
42178e2a1e drivers/gpio/gpio-mpc8xxx.c        Liu Gang                2016-02-03 @373  	iounmap(mpc8xxx_gc->regs);
42178e2a1e drivers/gpio/gpio-mpc8xxx.c        Liu Gang                2016-02-03  374  	return ret;
257e10752c drivers/gpio/gpio-mpc8xxx.c        Ricardo Ribalda Delgado 2015-01-18  375  }
257e10752c drivers/gpio/gpio-mpc8xxx.c        Ricardo Ribalda Delgado 2015-01-18  376  
257e10752c drivers/gpio/gpio-mpc8xxx.c        Ricardo Ribalda Delgado 2015-01-18  377  static int mpc8xxx_remove(struct platform_device *pdev)
257e10752c drivers/gpio/gpio-mpc8xxx.c        Ricardo Ribalda Delgado 2015-01-18  378  {
257e10752c drivers/gpio/gpio-mpc8xxx.c        Ricardo Ribalda Delgado 2015-01-18  379  	struct mpc8xxx_gpio_chip *mpc8xxx_gc = platform_get_drvdata(pdev);
257e10752c drivers/gpio/gpio-mpc8xxx.c        Ricardo Ribalda Delgado 2015-01-18  380  
257e10752c drivers/gpio/gpio-mpc8xxx.c        Ricardo Ribalda Delgado 2015-01-18  381  	if (mpc8xxx_gc->irq) {

:::::: The code at line 373 was first introduced by commit
:::::: 42178e2a1e42b480ada954750f248b53d3fb5940 drivers/gpio: Switch gpio-mpc8xxx to use gpio-generic

:::::: TO: Liu Gang <Gang.Liu@nxp.com>
:::::: CC: Linus Walleij <linus.walleij@linaro.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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drivers/gpio/gpio-mpc8xxx.c:373:2: error: implicit declaration of  function 'iounmap' kbuild test robot <fengguang.wu@intel.com> - 2016-06-26 12:10 +0200

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