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gpiolib: Disable compat ->read() code in UML case

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It appears that UML (arch/um) has no compat.h header defined and hence
can't compile a recently provided piece of code in GPIO library.

Disable compat ->read() code in UML case to avoid compilation errors.

While at it, use pattern which is already being used in the kernel elsewhere.

Fixes: 5ad284ab3a ("gpiolib: Fix line event handling in syscall compatible mode")
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20201005131044.87276-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Andy Shevchenko 2020-10-05 16:10:44 +03:00 committed by Linus Walleij
parent 549738f15d
commit 47e538d86d
1 changed files with 1 additions and 1 deletions
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2
drivers/gpio/gpiolib-cdev.c
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@ -425,7 +425,7 @@ static __poll_t lineevent_poll(struct file *file,
static ssize_t lineevent_get_size(void)
{
#ifdef __x86_64__
#if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
/* i386 has no padding after 'id' */
if (in_ia32_syscall()) {
struct compat_gpioeevent_data {