[dpdk-dev] [PATCH 1/3] eal/x86: fix build with clang for old AVX

[Thomas Monjalon <thomas.monjalon@6wind.com>]

When configuring RTE_MACHINE to "default", rte_memcpy implementation
is the default one (old AVX).
In this code, clang raises a warning thanks to -Wsometimes-uninitialized:

rte_memcpy.h:838:6: error:
variable 'srcofs' is used uninitialized whenever 'if' condition is false
        if (dstofss > 0) {
            ^~~~~~~~~~~
rte_memcpy.h:849:6: note: uninitialized use occurs here
        if (srcofs == 0) {
            ^~~~~~

It is fixed by initializing srcofs to 0.

Fixes: 1ae817f9f887 ("eal/x86: tune memcpy for platforms without AVX512")

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
---
 lib/librte_eal/common/include/arch/x86/rte_memcpy.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_eal/common/include/arch/x86/rte_memcpy.h b/lib/librte_eal/common/include/arch/x86/rte_memcpy.h
index 8e2c53c..5badfbc 100644
--- a/lib/librte_eal/common/include/arch/x86/rte_memcpy.h
+++ b/lib/librte_eal/common/include/arch/x86/rte_memcpy.h
@@ -739,7 +739,7 @@ rte_memcpy(void *dst, const void *src, size_t n)
 	uintptr_t srcu = (uintptr_t)src;
 	void *ret = dst;
 	size_t dstofss;
-	size_t srcofs;
+	size_t srcofs = 0;
 
 	/**
 	 * Copy less than 16 bytes
-- 
2.7.0