[Xen-devel] [PATCH 1/3] stubdom: fix vtpm compilation on GCC-7

[Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

GCC-7 have -Wimplicit-fallthrough enabled with -Wextra. Add appropriate
comment which both mute the warning and improve readibility.

Signed-off-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
---
 stubdom/Makefile                        |  1 +
 stubdom/vtpm-implicit-fallthrough.patch | 10 ++++++++++
 2 files changed, 11 insertions(+)
 create mode 100644 stubdom/vtpm-implicit-fallthrough.patch

diff --git a/stubdom/Makefile b/stubdom/Makefile
index db01827..5055e31 100644
--- a/stubdom/Makefile
+++ b/stubdom/Makefile
@@ -228,6 +228,7 @@ tpm_emulator-$(XEN_TARGET_ARCH): 
tpm_emulator-$(TPMEMU_VERSION).tar.gz
        patch -d $@ -p1 < vtpm-deepquote.patch
        patch -d $@ -p1 < vtpm-deepquote-anyloc.patch
        patch -d $@ -p1 < vtpm-cmake-Wextra.patch
+       patch -d $@ -p1 < vtpm-implicit-fallthrough.patch
        mkdir $@/build
        cd $@/build; CC=${CC} $(CMAKE) .. -DCMAKE_C_FLAGS:STRING="-std=c99 
-DTPM_NO_EXTERN $(TARGET_CPPFLAGS) $(TARGET_CFLAGS) 
-Wno-declaration-after-statement"
        touch $@
diff --git a/stubdom/vtpm-implicit-fallthrough.patch 
b/stubdom/vtpm-implicit-fallthrough.patch
new file mode 100644
index 0000000..db97be5
--- /dev/null
+++ b/stubdom/vtpm-implicit-fallthrough.patch
@@ -0,0 +1,10 @@
+--- tpm_emulator-x86_64/tpm/tpm_cmd_handler.c.orig     2017-04-27 
13:37:14.408000000 +0200
++++ tpm_emulator-x86_64/tpm/tpm_cmd_handler.c  2017-04-27 13:39:53.585000000 
+0200
+@@ -3397,6 +3397,7 @@
+                   sizeof(rsp->auth2->nonceOdd.nonce));
+       tpm_hmac_update(&hmac, (BYTE*)&rsp->auth2->continueAuthSession, 1);
+       tpm_hmac_final(&hmac, rsp->auth2->auth);
++      /* fall-thru */
+     case TPM_TAG_RSP_AUTH1_COMMAND:
+       tpm_hmac_init(&hmac, rsp->auth1->secret, sizeof(rsp->auth1->secret));
+       tpm_hmac_update(&hmac, rsp->auth1->digest, sizeof(rsp->auth1->digest));
-- 
2.7.4


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