x86: if stackprotector is enabled, thn use stack-protector-all by default

also enable the rodata and nx tests.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

arch/x86/Kconfig

@@ -1142,7 +1142,7 @@ config SECCOMP
 
 config CC_STACKPROTECTOR
 	bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
-	depends on X86_64 && EXPERIMENTAL && BROKEN
+	depends on X86_64
 	help
          This option turns on the -fstack-protector GCC feature. This
 	  feature puts, at the beginning of critical functions, a canary
@@ -1159,6 +1159,7 @@ config CC_STACKPROTECTOR
 config CC_STACKPROTECTOR_ALL
 	bool "Use stack-protector for all functions"
 	depends on CC_STACKPROTECTOR
+	default y
 	help
 	  Normally, GCC only inserts the canary value protection for
 	  functions that use large-ish on-stack buffers. By enabling

arch/x86/Kconfig.debug

@@ -102,6 +102,7 @@ config DIRECT_GBPAGES
 config DEBUG_RODATA_TEST
 	bool "Testcase for the DEBUG_RODATA feature"
 	depends on DEBUG_RODATA
+	default y
 	help
 	  This option enables a testcase for the DEBUG_RODATA
 	  feature as well as for the change_page_attr() infrastructure.