Merge android-4.4.143 (7bbfac1) into msm-4.4

* refs/heads/tmp-7bbfac1
  Linux 4.4.143
  net/nfc: Avoid stalls when nfc_alloc_send_skb() returned NULL.
  rds: avoid unenecessary cong_update in loop transport
  KEYS: DNS: fix parsing multiple options
  netfilter: ebtables: reject non-bridge targets
  MIPS: Use async IPIs for arch_trigger_cpumask_backtrace()
  MIPS: Call dump_stack() from show_regs()
  rtlwifi: rtl8821ae: fix firmware is not ready to run
  net: cxgb3_main: fix potential Spectre v1
  net/mlx5: Fix command interface race in polling mode
  net_sched: blackhole: tell upper qdisc about dropped packets
  vhost_net: validate sock before trying to put its fd
  tcp: prevent bogus FRTO undos with non-SACK flows
  tcp: fix Fast Open key endianness
  r8152: napi hangup fix after disconnect
  qed: Limit msix vectors in kdump kernel to the minimum required count.
  net: sungem: fix rx checksum support
  net/mlx5: Fix incorrect raw command length parsing
  net: dccp: switch rx_tstamp_last_feedback to monotonic clock
  net: dccp: avoid crash in ccid3_hc_rx_send_feedback()
  atm: zatm: Fix potential Spectre v1
  crypto: crypto4xx - fix crypto4xx_build_pdr, crypto4xx_build_sdr leak
  crypto: crypto4xx - remove bad list_del
  bcm63xx_enet: do not write to random DMA channel on BCM6345
  bcm63xx_enet: correct clock usage
  ocfs2: subsystem.su_mutex is required while accessing the item->ci_parent
  Revert "sit: reload iphdr in ipip6_rcv"
  x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h>
  compiler-gcc.h: Add __attribute__((gnu_inline)) to all inline declarations
  compiler, clang: always inline when CONFIG_OPTIMIZE_INLINING is disabled
  compiler, clang: properly override 'inline' for clang
  compiler, clang: suppress warning for unused static inline functions

Change-Id: Ia4be0ff93c81aee090c38127014680460e8cc756
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>

1 files changed, 22 insertions, 7 deletions

diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 557dae96ce74..143d40e8a1ea 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -65,25 +65,40 @@
 #endif
 
 /*
+ * Feature detection for gnu_inline (gnu89 extern inline semantics). Either
+ * __GNUC_STDC_INLINE__ is defined (not using gnu89 extern inline semantics,
+ * and we opt in to the gnu89 semantics), or __GNUC_STDC_INLINE__ is not
+ * defined so the gnu89 semantics are the default.
+ */
+#ifdef __GNUC_STDC_INLINE__
+# define __gnu_inline	__attribute__((gnu_inline))
+#else
+# define __gnu_inline
+#endif
+
+/*
  * Force always-inline if the user requests it so via the .config,
  * or if gcc is too old.
  * GCC does not warn about unused static inline functions for
  * -Wunused-function.  This turns out to avoid the need for complex #ifdef
  * directives.  Suppress the warning in clang as well by using "unused"
  * function attribute, which is redundant but not harmful for gcc.
+ * Prefer gnu_inline, so that extern inline functions do not emit an
+ * externally visible function. This makes extern inline behave as per gnu89
+ * semantics rather than c99. This prevents multiple symbol definition errors
+ * of extern inline functions at link time.
+ * A lot of inline functions can cause havoc with function tracing.
  */
 #if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) ||		\
     !defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4)
-#define inline inline		__attribute__((always_inline,unused)) notrace
-#define __inline__ __inline__	__attribute__((always_inline,unused)) notrace
-#define __inline __inline	__attribute__((always_inline,unused)) notrace
+#define inline \
+	inline __attribute__((always_inline, unused)) notrace __gnu_inline
 #else
-/* A lot of inline functions can cause havoc with function tracing */
-#define inline inline		__attribute__((unused)) notrace
-#define __inline__ __inline__	__attribute__((unused)) notrace
-#define __inline __inline	__attribute__((unused)) notrace
+#define inline inline		__attribute__((unused)) notrace __gnu_inline
 #endif
 
+#define __inline__ inline
+#define __inline inline
 #define __always_inline	inline __attribute__((always_inline))
 #define  noinline	__attribute__((noinline))