Make: Enable VLA check for kona kernel

Remove VLA (Variable Length Array) as warning-3 option and enable VLA by
default and treat VLA usage as errors. Update gcc-wrapper to ignore
upstream VLA warnings.

Signed-off-by: Channagoud Kadabi <ckadabi@codeaurora.org>
Change-Id: I85e9959c46b599c59a4a10415cd112222467cfca

Makefile

@@ -760,6 +760,8 @@ endif
 
 KBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
 
+KBUILD_CFLAGS   += $(call cc-option, -Wvla)
+
 ifdef CONFIG_DEBUG_INFO
 ifdef CONFIG_DEBUG_INFO_SPLIT
 KBUILD_CFLAGS   += $(call cc-option, -gsplit-dwarf, -g)

scripts/Makefile.extrawarn

@@ -52,7 +52,6 @@ warning-3 += -Wpointer-arith
 warning-3 += -Wredundant-decls
 warning-3 += -Wswitch-default
 warning-3 += $(call cc-option, -Wpacked-bitfield-compat)
-warning-3 += $(call cc-option, -Wvla)
 
 warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
 warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))

scripts/gcc-wrapper.py

@@ -17,6 +17,32 @@ import subprocess
 # force LANG to be set to en_US.UTF-8 to get consistent warnings.
 
 allowed_warnings = set([
+    "seqiv.c:76",
+    "echainiv.c:50",
+    "crypto.c:67",
+    "shash.c:91",
+    "shash.c:127",
+    "smp.c:176",
+    "xcbc.c:68",
+    "hmac.c:56",
+    "cbc.c:14",
+    "cbc.h:116",
+    "cryptd.c:487",
+    "cryptd.c:515",
+    "ablkcipher.c:215",
+    "authenc.c:188",
+    "authenc.c:186",
+    "authencesn.c:186",
+    "libcrc32c.c:45",
+    "ppp_mppe.c:158",
+    "ppp_mppe.c:369",
+    "ppp_mppe.c:483",
+    "dm-verity-fec.c:218",
+    "umid.c:138",
+    "umid.c:213",
+    "umid.c:388",
+    "shash.c:92",
+    "shash.c:128",
  ])
 
 # Capture the name of the object file, can find it.