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Linux compat 3.7.1, on_each_cpu()

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Some kernels require that we include the 'linux/irqflags.h'
header for the SPL_AC_3ARGS_ON_EACH_CPU check.  Otherwise,
the functions local_irq_enable()/local_irq_disable() will not
be defined and the prototype will be misdetected as the four
argument version.

This change actually include 'linux/interrupt.h' which in turn
includes 'linux/irqflags.h' to be as generic as possible.

Additionally, passing NULL as the function can result in a
gcc error because the on_each_cpu() macro executes it
unconditionally.  To make the test more robust we pass the
dummy function on_each_cpu_func().

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #204
This commit is contained in:
Brian Behlendorf 2013-01-07 14:09:09 -08:00
parent 1c7b3eaf87
commit 050cd84e62
1 changed files with 4 additions and 1 deletions
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5
config/spl-build.m4
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@ -1312,9 +1312,12 @@ dnl #
AC_DEFUN([SPL_AC_3ARGS_ON_EACH_CPU], [
AC_MSG_CHECKING([whether on_each_cpu() wants 3 args])
SPL_LINUX_TRY_COMPILE([
#include <linux/interrupt.h>
#include <linux/smp.h>
void on_each_cpu_func(void *data) { return; }
],[
on_each_cpu(NULL, NULL, 0);
on_each_cpu(on_each_cpu_func, NULL, 0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_3ARGS_ON_EACH_CPU, 1,