objtool: update objtool.txt references

Changeset a8e35fec ("objtool: Update documentation")
renamed: tools/objtool/Documentation/stack-validation.txt
to: tools/objtool/Documentation/objtool.txt.

Update the cross-references accordingly.

Fixes: a8e35fec ("objtool: Update documentation")
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Link: https://lore.kernel.org/r/ec285ece6348a5be191aebe45f78d06b3319056b.1656234456.git.mchehab@kernel.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/x86/orc-unwinder.rst

@@ -140,7 +140,7 @@ Unwinder implementation details
 
 Objtool generates the ORC data by integrating with the compile-time
 stack metadata validation feature, which is described in detail in
-tools/objtool/Documentation/stack-validation.txt.  After analyzing all
+tools/objtool/Documentation/objtool.txt.  After analyzing all
 the code paths of a .o file, it creates an array of orc_entry structs,
 and a parallel array of instruction addresses associated with those
 structs, and writes them to the .orc_unwind and .orc_unwind_ip sections

include/linux/objtool.h

@@ -62,7 +62,7 @@ struct unwind_hint {
  * It should only be used in special cases where you're 100% sure it won't
  * affect the reliability of frame pointers and kernel stack traces.
  *
- * For more information, see tools/objtool/Documentation/stack-validation.txt.
+ * For more information, see tools/objtool/Documentation/objtool.txt.
  */
 #define STACK_FRAME_NON_STANDARD(func) \
 	static void __used __section(".discard.func_stack_frame_non_standard") \

lib/Kconfig.debug

@@ -498,7 +498,7 @@ config STACK_VALIDATION
 	  runtime stack traces are more reliable.
 
 	  For more information, see
-	  tools/objtool/Documentation/stack-validation.txt.
+	  tools/objtool/Documentation/objtool.txt.
 
 config NOINSTR_VALIDATION
 	bool

tools/include/linux/objtool.h

@@ -62,7 +62,7 @@ struct unwind_hint {
  * It should only be used in special cases where you're 100% sure it won't
  * affect the reliability of frame pointers and kernel stack traces.
  *
- * For more information, see tools/objtool/Documentation/stack-validation.txt.
+ * For more information, see tools/objtool/Documentation/objtool.txt.
  */
 #define STACK_FRAME_NON_STANDARD(func) \
 	static void __used __section(".discard.func_stack_frame_non_standard") \

tools/objtool/check.c

@@ -3190,7 +3190,7 @@ static struct instruction *next_insn_to_validate(struct objtool_file *file,
  * Follow the branch starting at the given instruction, and recursively follow
  * any other branches (jumps).  Meanwhile, track the frame pointer state at
  * each instruction and validate all the rules described in
- * tools/objtool/Documentation/stack-validation.txt.
+ * tools/objtool/Documentation/objtool.txt.
  */
 static int validate_branch(struct objtool_file *file, struct symbol *func,
 			   struct instruction *insn, struct insn_state state)