[DTrace-devel] [PATCH 4/4] test: Do not depend on ext4

[eugene.loh at oracle.com]

From: Eugene Loh <eugene.loh at oracle.com>

It is possible that there is no ext4 module, whether built-in or otherwise,
even if its symbols are present.  E.g.,
    # grep ext4_dir_operations /proc/kallmodsyms
    ffffc45a59d9ee88 100 D ext4_dir_operations
    # grep -w ext4 /proc/kallmodsyms
    #

Meanwhile, in
    ab883bae "tests, io, scalars: use kallsyms instead of kallmodsyms where possible"
we read:
    scalars/tst.misc.x needs adjusting to check for the presence of the actual
    symbols we are looking up, since the modules might well be built-in, and
    thus not show up in /proc/kallsyms.

With that patch, in test/unittest/scalars/tst.misc.x, we check:
   -if ! $(grep -qw ext4 /proc/kallmodsyms); then
   +if ! grep -qw ext4_dir_operations /proc/kallsyms; then
        exit 1
    fi

So it is possible for us to find
        `ext4_dir_operations
but not
    ext4`ext4_dir_operations

Change the .d script to look simply for `ext4_dir_operations.

Signed-off-by: Eugene Loh <eugene.loh at oracle.com>
---
 test/unittest/scalars/tst.misc.d | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/unittest/scalars/tst.misc.d b/test/unittest/scalars/tst.misc.d
index 60edab45e..6a5f4ae2e 100644
--- a/test/unittest/scalars/tst.misc.d
+++ b/test/unittest/scalars/tst.misc.d
@@ -20,7 +20,7 @@
 BEGIN
 {
 	printf("\nr_cpu_ids = 0x%x\n", `nr_cpu_ids);
-	printf("ext4`ext4_dir_operations = %p\n", &ext4`ext4_dir_operations);
+	printf("ext4`ext4_dir_operations = %p\n", &`ext4_dir_operations);
 	printf("isofs`isofs_dir_operations = %p\n", &isofs`isofs_dir_operations);
 	printf("vmlinux`major_names = %p\n", &vmlinux`major_names);
 	x = 123;
-- 
2.43.5