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From: Lucas Stach <l.stach@pengutronix.de>
To: ptxdist@pengutronix.de
Subject: [ptxdist] [PATCH 1/4] dtc: fix build with GCC11
Date: Sat,  1 May 2021 00:31:03 +0200	[thread overview]
Message-ID: <20210430223106.2472-1-l.stach@pengutronix.de> (raw)

Pick patch from upstream to fix warning with GCC11.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
 .../0001-fdtdump-Fix-gcc11-warning.patch      | 30 +++++++++++++++++++
 patches/dtc-v1.6.0/series                     |  4 +++
 2 files changed, 34 insertions(+)
 create mode 100644 patches/dtc-v1.6.0/0001-fdtdump-Fix-gcc11-warning.patch
 create mode 100644 patches/dtc-v1.6.0/series

diff --git a/patches/dtc-v1.6.0/0001-fdtdump-Fix-gcc11-warning.patch b/patches/dtc-v1.6.0/0001-fdtdump-Fix-gcc11-warning.patch
new file mode 100644
index 000000000000..052419940a15
--- /dev/null
+++ b/patches/dtc-v1.6.0/0001-fdtdump-Fix-gcc11-warning.patch
@@ -0,0 +1,30 @@
+From: David Gibson <david@gibson.dropbear.id.au>
+Date: Wed, 6 Jan 2021 14:52:26 +1100
+Subject: [PATCH] fdtdump: Fix gcc11 warning
+
+In one place, fdtdump abuses fdt_set_magic(), passing it just a small char
+array instead of the full fdt header it expects.  That's relying on the
+fact that in fact fdt_set_magic() will only actually access the first 4
+bytes of the buffer.
+
+This trips a new warning in GCC 11 - and it's entirely possible it was
+always UB.  So, don't do that.
+
+Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
+---
+ fdtdump.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/fdtdump.c b/fdtdump.c
+index 9613befede71..d9fb374a59be 100644
+--- a/fdtdump.c
++++ b/fdtdump.c
+@@ -217,7 +217,7 @@ int main(int argc, char *argv[])
+ 		char *p = buf;
+ 		char *endp = buf + len;
+ 
+-		fdt_set_magic(smagic, FDT_MAGIC);
++		fdt32_st(smagic, FDT_MAGIC);
+ 
+ 		/* poor man's memmem */
+ 		while ((endp - p) >= FDT_MAGIC_SIZE) {
diff --git a/patches/dtc-v1.6.0/series b/patches/dtc-v1.6.0/series
new file mode 100644
index 000000000000..a7e9d0319ba0
--- /dev/null
+++ b/patches/dtc-v1.6.0/series
@@ -0,0 +1,4 @@
+# generated by git-ptx-patches
+#tag:base --start-number 1
+0001-fdtdump-Fix-gcc11-warning.patch
+# cb5c26c7ab3ae2082ecff7af4de4e8c5  - git-ptx-patches magic
-- 
2.29.2


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             reply	other threads:[~2021-04-30 22:31 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-30 22:31 Lucas Stach [this message]
2021-04-30 22:31 ` [ptxdist] [PATCH 2/4] nspr: version bump 4.26 -> 4.30 Lucas Stach
2021-04-30 22:31 ` [ptxdist] [PATCH 3/4] host-nss: disable array-parameter warning Lucas Stach
2021-05-02 13:14   ` Roland Hieber
2021-04-30 22:31 ` [ptxdist] [PATCH 4/4] host-fakeroot: version bump 1.25.1 -> 1.25.3 Lucas Stach
2021-05-02 13:18   ` Roland Hieber

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