eal: fix clang build with intrinsics forced

This fixes x86_64-native-linuxapp-clang build with
CONFIG_RTE_FORCE_INTRINSICS=y:

    include/generic/rte_atomic.h:218:9: error:
        implicit declaration of function '__atomic_exchange_2'
        is invalid in C99 [-Werror,-Wimplicit-function-declaration]

    include/generic/rte_atomic.h:501:9: error:
        implicit declaration of function '__atomic_exchange_4'
        is invalid in C99 [-Werror,-Wimplicit-function-declaration]

    include/generic/rte_atomic.h:783:9: error:
        implicit declaration of function '__atomic_exchange_8'
        is invalid in C99 [-Werror,-Wimplicit-function-declaration]

We didn't caught this issue previously on other platforms because
CONFIG_RTE_FORCE_INTRINSICS enabled by default only for armv8.

Fixes: 7bdccb93078e ("eal: fix ARM build with clang")
Cc: stable@dpdk.org
Signed-off-by: Ilya Maximets <i.maximets@samsung.com>

diff --git a/lib/librte_eal/common/include/generic/rte_atomic.h b/lib/librte_eal/common/include/generic/rte_atomic.h
index d0c464f..4afd1ac 100644 (file)
--- a/lib/librte_eal/common/include/generic/rte_atomic.h
+++ b/lib/librte_eal/common/include/generic/rte_atomic.h
@@ -212,7 +212,7 @@ rte_atomic16_exchange(volatile uint16_t *dst, uint16_t val);
 static inline uint16_t
 rte_atomic16_exchange(volatile uint16_t *dst, uint16_t val)
 {
-#if defined(RTE_ARCH_ARM64) && defined(__clang__)
+#if defined(__clang__)
        return __atomic_exchange_n(dst, val, __ATOMIC_SEQ_CST);
 #else
        return __atomic_exchange_2(dst, val, __ATOMIC_SEQ_CST);
@@ -495,7 +495,7 @@ rte_atomic32_exchange(volatile uint32_t *dst, uint32_t val);
 static inline uint32_t
 rte_atomic32_exchange(volatile uint32_t *dst, uint32_t val)
 {
-#if defined(RTE_ARCH_ARM64) && defined(__clang__)
+#if defined(__clang__)
        return __atomic_exchange_n(dst, val, __ATOMIC_SEQ_CST);
 #else
        return __atomic_exchange_4(dst, val, __ATOMIC_SEQ_CST);
@@ -777,7 +777,7 @@ rte_atomic64_exchange(volatile uint64_t *dst, uint64_t val);
 static inline uint64_t
 rte_atomic64_exchange(volatile uint64_t *dst, uint64_t val)
 {
-#if defined(RTE_ARCH_ARM64) && defined(__clang__)
+#if defined(__clang__)
        return __atomic_exchange_n(dst, val, __ATOMIC_SEQ_CST);
 #else
        return __atomic_exchange_8(dst, val, __ATOMIC_SEQ_CST);