objtool: Rename "VMLINUX_VALIDATION" -> "NOINSTR_VALIDATION"

CONFIG_VMLINUX_VALIDATION is just the validation of the "noinstr" rules.
That name is a misnomer, because now objtool actually does vmlinux
validation for other reasons.

Rename CONFIG_VMLINUX_VALIDATION to CONFIG_NOINSTR_VALIDATION.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Link: https://lkml.kernel.org/r/173f07e2d6d1afc0874aed975a61783207c6a531.1650300597.git.jpoimboe@redhat.com

include/linux/instrumentation.h

@@ -2,7 +2,7 @@
 #ifndef __LINUX_INSTRUMENTATION_H
 #define __LINUX_INSTRUMENTATION_H
 
-#ifdef CONFIG_VMLINUX_VALIDATION
+#ifdef CONFIG_NOINSTR_VALIDATION
 
 #include <linux/stringify.h>
 
@@ -53,9 +53,9 @@
 		     ".popsection\n\t" : : "i" (c));			\
 })
 #define instrumentation_end() __instrumentation_end(__COUNTER__)
-#else /* !CONFIG_VMLINUX_VALIDATION */
+#else /* !CONFIG_NOINSTR_VALIDATION */
 # define instrumentation_begin()	do { } while(0)
 # define instrumentation_end()		do { } while(0)
-#endif /* CONFIG_VMLINUX_VALIDATION */
+#endif /* CONFIG_NOINSTR_VALIDATION */
 
 #endif /* __LINUX_INSTRUMENTATION_H */

lib/Kconfig.debug

@@ -500,7 +500,7 @@ config STACK_VALIDATION
 	  For more information, see
 	  tools/objtool/Documentation/stack-validation.txt.
 
-config VMLINUX_VALIDATION
+config NOINSTR_VALIDATION
 	bool
 	depends on HAVE_OBJTOOL && DEBUG_ENTRY
 	select OBJTOOL

scripts/link-vmlinux.sh

@@ -160,7 +160,7 @@ objtool_link()
 		objtoolopt="${objtoolopt} --lto"
 	fi
 
-	if is_enabled CONFIG_VMLINUX_VALIDATION; then
+	if is_enabled CONFIG_NOINSTR_VALIDATION; then
 		objtoolopt="${objtoolopt} --noinstr"
 	fi