[PATCH v2] selftests/ftrace: Add missing spaces after ! in probe syntax tests

[Jaewon Jung]

Add the missing space between ! and grep. Otherwise, the shell tries
to run !grep and reports "!grep: not found". This always skips the
conditional checks without checking for kernel return probe argument
support.

Fixes: 25f00e40ce79 ("tracing/probes: Support $argN in return probe (kprobe and fprobe)")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Jaewon Jung <jaewon8868@xxxxxxxxx>
Acked-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
---
Changes in v2:
- Add Fixes, Cc stable and Acked-by tags as suggested by Masami.

 .../selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc  | 4 ++--
 .../selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc    | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
index 384209968325..70751573e8de 100644
--- a/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
+++ b/tools/testing/selftests/ftrace/test.d/dynevent/fprobe_syntax_errors.tc
@@ -33,7 +33,7 @@ check_error 'f vfs_read ^$stack10000'	# BAD_STACK_NUM
 
 check_error 'f vfs_read ^$arg10000'	# BAD_ARG_NUM
 
-if !grep -q 'kernel return probes support:' README; then
+if ! grep -q 'kernel return probes support:' README; then
 check_error 'f vfs_read $retval ^$arg1' # BAD_VAR
 fi
 check_error 'f vfs_read ^$none_var'	# BAD_VAR
@@ -100,7 +100,7 @@ if grep -q "<argname>" README; then
 check_error 'f vfs_read args=^$arg*'		# BAD_VAR_ARGS
 check_error 'f vfs_read +0(^$arg*)'		# BAD_VAR_ARGS
 check_error 'f vfs_read $arg* ^$arg*'		# DOUBLE_ARGS
-if !grep -q 'kernel return probes support:' README; then
+if ! grep -q 'kernel return probes support:' README; then
 check_error 'f vfs_read%return ^$arg*'		# NOFENTRY_ARGS
 fi
 check_error 'f vfs_read ^hoge'			# NO_BTFARG
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
index b0e6b80ccb01..06efa67e01ff 100644
--- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
@@ -108,7 +108,7 @@ if grep -q "<argname>" README; then
 check_error 'p vfs_read args=^$arg*'		# BAD_VAR_ARGS
 check_error 'p vfs_read +0(^$arg*)'		# BAD_VAR_ARGS
 check_error 'p vfs_read $arg* ^$arg*'		# DOUBLE_ARGS
-if !grep -q 'kernel return probes support:' README; then
+if ! grep -q 'kernel return probes support:' README; then
 check_error 'r vfs_read ^$arg*'			# NOFENTRY_ARGS
 fi
 check_error 'p vfs_read+20 ^$arg*'		# NOFENTRY_ARGS
-- 
2.43.0