selftests/x86/fsgsbase: Fix a comment in the ptrace_write_gsbase test

A comment was unclear.  Fix it.

Fixes: 5e7ec8578fa3 ("selftests/x86/fsgsbase: Test ptracer-induced GS base write with FSGSBASE")
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/901034a91a40169ec84f1f699ea86704dff762e4.1593192140.git.luto@kernel.org

diff --git a/tools/testing/selftests/x86/fsgsbase.c b/tools/testing/selftests/x86/fsgsbase.c
index 9a43498..f47495d 100644 (file)
--- a/tools/testing/selftests/x86/fsgsbase.c
+++ b/tools/testing/selftests/x86/fsgsbase.c
@@ -498,7 +498,8 @@ static void test_ptrace_write_gsbase(void)
                         * base would zero the selector.  On newer kernels,
                         * this behavior has changed -- poking the base
                         * changes only the base and, if FSGSBASE is not
-                        * available, this may not effect.
+                        * available, this may have no effect once the tracee
+                        * is resumed.
                         */
                        if (gs == 0)
                                printf("\tNote: this is expected behavior on older kernels.\n");