Re: [PATCH V1 2/2] mm/damon: move damon_rand definition into damon.h

[Xin Hao]

Hi Park:

On 11/21/21 7:33 PM, SeongJae Park wrote:
> Hi Xin,
>
>
> On Sun, 21 Nov 2021 01:27:54 +0800 Xin Hao <xhao@xxxxxxxxxxxxxxxxx> wrote:
>
> > damon_rand() is called in three files:damon/core.c, damon/
> > paddr.c, damon/vaddr.c, i think there is no need to redefine
> > this twice, So move it to damon.h will be a good choice.
> Good finding.  Could you please append '()' after 'damon_rand' in the title
> (s/damon_rand definition/damon_rand() definition)?
Ok i will do;
> > Signed-off-by: Xin Hao <xhao@xxxxxxxxxxxxxxxxx>
> After doing that, you could add
>
> Reviewed-by: SeongJae Park <sj@xxxxxxxxxx>
>
>
> Thanks,
> SJ
>
> > ---
> >   include/linux/damon.h   | 4 ++++
> >   mm/damon/core.c         | 4 ----
> >   mm/damon/prmtv-common.h | 4 ----
> >   3 files changed, 4 insertions(+), 8 deletions(-)
> >
> > diff --git a/include/linux/damon.h b/include/linux/damon.h
> > index 8a73e825e0d5..8706b17a9acf 100644
> > --- a/include/linux/damon.h
> > +++ b/include/linux/damon.h
> > @@ -11,12 +11,16 @@
> >   #include <linux/mutex.h>
> >   #include <linux/time64.h>
> >   #include <linux/types.h>
> > +#include <linux/random.h>
> >   
> >   /* Minimal region size.  Every damon_region is aligned by this. */
> >   #define DAMON_MIN_REGION	PAGE_SIZE
> >   /* Max priority score for DAMON-based operation schemes */
> >   #define DAMOS_MAX_SCORE		(99)
> >   
> > +/* Get a random number in [l, r) */
> > +#define damon_rand(l, r) (l + prandom_u32_max(r - l))
> > +
> >   /**
> >    * struct damon_addr_range - Represents an address region of [@start, @end).
> >    * @start:	Start address of the region (inclusive).
> > diff --git a/mm/damon/core.c b/mm/damon/core.c
> > index 4d2c3a0c7c8a..bdec32ef78c0 100644
> > --- a/mm/damon/core.c
> > +++ b/mm/damon/core.c
> > @@ -11,7 +11,6 @@
> >   #include <linux/delay.h>
> >   #include <linux/kthread.h>
> >   #include <linux/mm.h>
> > -#include <linux/random.h>
> >   #include <linux/slab.h>
> >   #include <linux/string.h>
> >   
> > @@ -23,9 +22,6 @@
> >   #define DAMON_MIN_REGION 1
> >   #endif
> >   
> > -/* Get a random number in [l, r) */
> > -#define damon_rand(l, r) (l + prandom_u32_max(r - l))
> > -
> >   static DEFINE_MUTEX(damon_lock);
> >   static int nr_running_ctxs;
> >   
> > diff --git a/mm/damon/prmtv-common.h b/mm/damon/prmtv-common.h
> > index 61f27037603e..e790cb5f8fe0 100644
> > --- a/mm/damon/prmtv-common.h
> > +++ b/mm/damon/prmtv-common.h
> > @@ -6,10 +6,6 @@
> >    */
> >   
> >   #include <linux/damon.h>
> > -#include <linux/random.h>
> > -
> > -/* Get a random number in [l, r) */
> > -#define damon_rand(l, r) (l + prandom_u32_max(r - l))
> >   
> >   struct page *damon_get_page(unsigned long pfn);
> >   
> > --
> > 2.31.0
--
Best Regards!
Xin Hao