This is a note to let you know that I've just added the patch titled
selftests: vm: remove dependecy from internal kernel macros
to the 5.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
selftests-vm-remove-dependecy-from-internal-kernel-m.patch
and it can be found in the queue-5.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit fc41ca22447044fb968d76092ce6243e40cc3110
Author: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx>
Date: Wed Jan 19 15:15:31 2022 +0500
selftests: vm: remove dependecy from internal kernel macros
[ Upstream commit 681696862bc1823595c05960a83766d1aa965c17 ]
The defination of swap() is used from kernel's internal header when this
test is built in source tree. The build fails when this test is built
out of source tree as defination of swap() isn't found. Selftests
shouldn't depend on kernel's internal header files. They can only depend
on uapi header files. Add the defination of swap() to fix the build
error:
gcc -Wall -I/linux_mainline2/build/usr/include -no-pie userfaultfd.c -lrt -lpthread -o /linux_mainline2/build/kselftest/vm/userfaultfd
userfaultfd.c: In function ‘userfaultfd_stress’:
userfaultfd.c:1530:3: warning: implicit declaration of function ‘swap’; did you mean ‘swab’? [-Wimplicit-function-declaration]
1530 | swap(area_src, area_dst);
| ^~~~
| swab
/usr/bin/ld: /tmp/cclUUH7V.o: in function `userfaultfd_stress':
userfaultfd.c:(.text+0x4d64): undefined reference to `swap'
/usr/bin/ld: userfaultfd.c:(.text+0x4d82): undefined reference to `swap'
collect2: error: ld returned 1 exit status
Fixes: 2c769ed7137a ("tools/testing/selftests/vm/userfaultfd.c: use swap() to make code cleaner")
Signed-off-by: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx>
Reviewed-by: Alistair Popple <apopple@xxxxxxxxxx>
Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c
index 3fc1d2ee2948..c964bfe9fbcd 100644
--- a/tools/testing/selftests/vm/userfaultfd.c
+++ b/tools/testing/selftests/vm/userfaultfd.c
@@ -120,6 +120,9 @@ struct uffd_stats {
~(unsigned long)(sizeof(unsigned long long) \
- 1)))
+#define swap(a, b) \
+ do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
+
const char *examples =
"# Run anonymous memory test on 100MiB region with 99999 bounces:\n"
"./userfaultfd anon 100 99999\n\n"
