linux-kernel - [PATCH v2 09/11] selftests/mm: move psize(), pshift() into vm

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Message-ID: <20230620011719.155379-11-jhubbard@nvidia.com>
Date:   Mon, 19 Jun 2023 18:17:17 -0700
From:   John Hubbard <jhubbard@...dia.com>
To:     David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>
CC:     Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        John Hubbard <jhubbard@...dia.com>,
        Peter Xu <peterx@...hat.com>
Subject: [PATCH v2 09/11] selftests/mm: move psize(), pshift() into vm_utils.c

This is in preparation for linking test programs with both vm_utils.c
and uffd-common.c. The static inline routines, while normally not a
problem, in this case complicate an already fragile header file
situation: the header files including other header files leads to
compilation failures in a subsequent patch that moves code around.

Anyway, there is no particular need for inlining here, so turn these
into normal functions, as a workaround to avoid refactoring the header
file includes for now.

Cc: David Hildenbrand <david@...hat.com>
Cc: Peter Xu <peterx@...hat.com>
Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 tools/testing/selftests/mm/vm_util.c | 14 ++++++++++++++
 tools/testing/selftests/mm/vm_util.h | 16 ++--------------
 2 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/tools/testing/selftests/mm/vm_util.c b/tools/testing/selftests/mm/vm_util.c
index 9b06a5034808..01296c17df02 100644
--- a/tools/testing/selftests/mm/vm_util.c
+++ b/tools/testing/selftests/mm/vm_util.c
@@ -301,3 +301,17 @@ int uffd_get_features(uint64_t *features)
 
 	return 0;
 }
+
+unsigned int psize(void)
+{
+	if (!__page_size)
+		__page_size = sysconf(_SC_PAGESIZE);
+	return __page_size;
+}
+
+unsigned int pshift(void)
+{
+	if (!__page_shift)
+		__page_shift = (ffsl(psize()) - 1);
+	return __page_shift;
+}
diff --git a/tools/testing/selftests/mm/vm_util.h b/tools/testing/selftests/mm/vm_util.h
index 07f39ed2efba..8aa543a3678b 100644
--- a/tools/testing/selftests/mm/vm_util.h
+++ b/tools/testing/selftests/mm/vm_util.h
@@ -3,7 +3,6 @@
 #include <stdbool.h>
 #include <sys/mman.h>
 #include <err.h>
-#include <string.h> /* ffsl() */
 #include <unistd.h> /* _SC_PAGESIZE */
 
 #define BIT_ULL(nr)                   (1ULL << (nr))
@@ -17,19 +16,8 @@
 extern unsigned int __page_size;
 extern unsigned int __page_shift;
 
-static inline unsigned int psize(void)
-{
-	if (!__page_size)
-		__page_size = sysconf(_SC_PAGESIZE);
-	return __page_size;
-}
-
-static inline unsigned int pshift(void)
-{
-	if (!__page_shift)
-		__page_shift = (ffsl(psize()) - 1);
-	return __page_shift;
-}
+unsigned int psize(void);
+unsigned int pshift(void);
 
 uint64_t pagemap_get_entry(int fd, char *start);
 bool pagemap_is_softdirty(int fd, char *start);
-- 
2.40.1