Re: PROBLEM: selftest/vm/cow.c failed to compile (‘MADV_PAGEOUT’ undeclared)

[Mirsad Goran Todorovac]

On 1/9/2023 5:42 PM, David Hildenbrand wrote:

Hi, thank you for your reply.

> > I hope this is enough information for you to debug the issue.
> >
> > I am standing by for any additional diagnostics needed.
>
> Won't userfaultfd.c fail in a similar way?
>
> Anyhow, khugepaged.c jas
>
> #ifndef MADV_PAGEOUT
> #define MADV_PAGEOUT 21
> #endif
>
> So most probably we should do the same.

Actually, David, it turned out that userfaultfd.c compiled 
out-of-the-box, and side-by-side comparison showed that it also included 
"/home/marvin/linux/kernel/linux_torvalds/usr/include/asm-generic/mman-common.h"

The only remaining difference was including <linux/mman.h>, which fixed 
the issue w/o #ifdef ... #endif

Hope this helps.

Please find the following diff.

Regards,
Mirsad

------------------------------------------------------------------------------
diff --git a/tools/testing/selftests/vm/cow.c 
b/tools/testing/selftests/vm/cow.c
index 26f6ea3079e2..dd8cf12c6776 100644
--- a/tools/testing/selftests/vm/cow.c
+++ b/tools/testing/selftests/vm/cow.c
@@ -16,6 +16,7 @@
 #include <fcntl.h>
 #include <dirent.h>
 #include <assert.h>
+#include <linux/mman.h>
 #include <sys/mman.h>
 #include <sys/ioctl.h>
 #include <sys/wait.h>




--
Mirsad Todorovac
Sistem inženjer
Grafički fakultet | Akademija likovnih umjetnosti
Sveučilište u Zagrebu
--
System engineer
Faculty of Graphic Arts | Academy of Fine Arts
University of Zagreb, Republic of Croatia
tel. +385 (0)1 3711 451
mob. +385 91 57 88 355