539edb5846
Use kernel/bounds.c to convert build-time spinlock_t size check into a preprocessor symbol and apply that to properly separate the page::ptl situation. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
28 lines
785 B
C
28 lines
785 B
C
/*
|
|
* Generate definitions needed by the preprocessor.
|
|
* This code generates raw asm output which is post-processed
|
|
* to extract and format the required data.
|
|
*/
|
|
|
|
#define __GENERATING_BOUNDS_H
|
|
/* Include headers that define the enum constants of interest */
|
|
#include <linux/page-flags.h>
|
|
#include <linux/mmzone.h>
|
|
#include <linux/kbuild.h>
|
|
#include <linux/page_cgroup.h>
|
|
#include <linux/log2.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
void foo(void)
|
|
{
|
|
/* The enum constants to put into include/generated/bounds.h */
|
|
DEFINE(NR_PAGEFLAGS, __NR_PAGEFLAGS);
|
|
DEFINE(MAX_NR_ZONES, __MAX_NR_ZONES);
|
|
DEFINE(NR_PCG_FLAGS, __NR_PCG_FLAGS);
|
|
#ifdef CONFIG_SMP
|
|
DEFINE(NR_CPUS_BITS, ilog2(CONFIG_NR_CPUS));
|
|
#endif
|
|
DEFINE(BLOATED_SPINLOCKS, sizeof(spinlock_t) > sizeof(int));
|
|
/* End of constants */
|
|
}
|