[Intel-gfx] [PATCH i-g-t 4/6] igt/drm_read: Fix build warning

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

In function ‘read’,
    inlined from ‘test_invalid_buffer’ at ../../home/tursulin/wc/intel-gpu-tools/tests/drm_read.c:113:2,
    inlined from ‘__igt_unique____real_main258’ at ../../home/tursulin/wc/intel-gpu-tools/tests/drm_read.c:297:3:
/usr/include/x86_64-linux-gnu/bits/unistd.h:47:10: warning: ‘__read_alias’ writing 4096 bytes into a region of size 0 overflows the destination [-Wstringop-overflow=]
   47 |   return __read_alias (__fd, __buf, __nbytes);
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Petri Latvala <petri.latvala@intel.com>
---
 tests/drm_read.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tests/drm_read.c b/tests/drm_read.c
index 4a966a23b550..d422220d3c4a 100644
--- a/tests/drm_read.c
+++ b/tests/drm_read.c
@@ -289,8 +289,16 @@ igt_main
 		igt_require(kmstest_get_vblank(fd, pipe, 0));
 	}
 
+/*
+ * Has to be here and not in (or around) test_invalid_buffer() to work around
+ * a gcc bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98512.
+ */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
+#pragma GCC diagnostic ignored "-Wstringop-overflow="
 	igt_subtest("invalid-buffer")
 		test_invalid_buffer(fd);
+#pragma GCC diagnostic pop
 
 	igt_subtest("fault-buffer")
 		test_fault_buffer(fd, pipe);
-- 
2.32.0