On 02/11/2016 05:04 AM, [email protected] wrote: > From: Joonsoo Kim <[email protected]> > > We can disable debug_pagealloc processing even if the code is compiled > with CONFIG_DEBUG_PAGEALLOC. This patch changes the code to query > whether it is enabled or not in runtime. > > v2: clean up code, per Christian. > > Signed-off-by: Joonsoo Kim <[email protected]>
Reviewed-by: Christian Borntraeger <[email protected]> > --- > mm/slub.c | 7 +++---- > 1 file changed, 3 insertions(+), 4 deletions(-) > > diff --git a/mm/slub.c b/mm/slub.c > index 606488b..a1874c2 100644 > --- a/mm/slub.c > +++ b/mm/slub.c > @@ -250,11 +250,10 @@ static inline void *get_freepointer_safe(struct > kmem_cache *s, void *object) > { > void *p; > > -#ifdef CONFIG_DEBUG_PAGEALLOC > + if (!debug_pagealloc_enabled()) > + return get_freepointer(s, object); > + > probe_kernel_read(&p, (void **)(object + s->offset), sizeof(p)); > -#else > - p = get_freepointer(s, object); > -#endif > return p; > } >
