eal: fix C++17 compilation

Compiling a C++ application that includes directly or indirectly
rte_common.h will cause a warning:

include/rte_common.h:350:37: warning: ISO C++17 does not allow
  ‘register’ storage class specifier [-Wregister]
 rte_combine32ms1b(register uint32_t x)

C++ is pickier than standard C and flags this antique usage.

The register keyword is an old K&R legacy and should be removed
everywhere in DPDK. For now, fix it where it hurts.

Fixes: 08f683174e94 ("eal: add functions for previous power of 2 alignment")
Cc: stable@dpdk.org
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

diff --git a/lib/librte_eal/include/rte_common.h b/lib/librte_eal/include/rte_common.h
index 668e8b0..0843ce6 100644 (file)
--- a/lib/librte_eal/include/rte_common.h
+++ b/lib/librte_eal/include/rte_common.h
@@ -409,7 +409,7 @@ __extension__ typedef uint64_t RTE_MARKER64[0];
  *    The combined value.
  */
 static inline uint32_t
-rte_combine32ms1b(register uint32_t x)
+rte_combine32ms1b(uint32_t x)
 {
        x |= x >> 1;
        x |= x >> 2;
@@ -431,7 +431,7 @@ rte_combine32ms1b(register uint32_t x)
  *    The combined value.
  */
 static inline uint64_t
-rte_combine64ms1b(register uint64_t v)
+rte_combine64ms1b(uint64_t v)
 {
        v |= v >> 1;
        v |= v >> 2;