Revert "Use inline keyword without underscores consistently"

This reverts commit 58f06e11122723d68c5cb393aeb4ed1c7a2e7bfe.

Bare `inline` is not ANSI C compatible, and NDK users may be using
that.

Test: treehugger
Change-Id: I82c5424522142001cd59da63ef3fd440014451ad
diff --git a/libc/include/android/api-level.h b/libc/include/android/api-level.h
index 113897c..77ec653 100644
--- a/libc/include/android/api-level.h
+++ b/libc/include/android/api-level.h
@@ -191,7 +191,7 @@
 #if __ANDROID_API__ < 29
 
 /* android_get_device_api_level is a static inline before API level 29. */
-#define __BIONIC_GET_DEVICE_API_LEVEL_INLINE static inline
+#define __BIONIC_GET_DEVICE_API_LEVEL_INLINE static __inline
 #include <bits/get_device_api_level_inlines.h>
 #undef __BIONIC_GET_DEVICE_API_LEVEL_INLINE
 
diff --git a/libc/include/android/legacy_stdlib_inlines.h b/libc/include/android/legacy_stdlib_inlines.h
index 0ca1022..f0985fe 100644
--- a/libc/include/android/legacy_stdlib_inlines.h
+++ b/libc/include/android/legacy_stdlib_inlines.h
@@ -38,15 +38,15 @@
 
 __BEGIN_DECLS
 
-static inline double strtod_l(const char* _Nonnull __s, char* _Nullable * _Nullable __end_ptr, locale_t _Nonnull __l) {
+static __inline double strtod_l(const char* _Nonnull __s, char* _Nullable * _Nullable __end_ptr, locale_t _Nonnull __l) {
   return strtod(__s, __end_ptr);
 }
 
-static inline float strtof_l(const char* _Nonnull __s, char* _Nullable * _Nullable __end_ptr, locale_t _Nonnull __l) {
+static __inline float strtof_l(const char* _Nonnull __s, char* _Nullable * _Nullable __end_ptr, locale_t _Nonnull __l) {
   return strtof(__s, __end_ptr);
 }
 
-static inline long strtol_l(const char* _Nonnull __s, char* _Nullable * _Nullable __end_ptr, int __base, locale_t _Nonnull __l) {
+static __inline long strtol_l(const char* _Nonnull __s, char* _Nullable * _Nullable __end_ptr, int __base, locale_t _Nonnull __l) {
   return strtol(__s, __end_ptr, __base);
 }
 
diff --git a/libc/include/android/legacy_termios_inlines.h b/libc/include/android/legacy_termios_inlines.h
index e557525..a816b40 100644
--- a/libc/include/android/legacy_termios_inlines.h
+++ b/libc/include/android/legacy_termios_inlines.h
@@ -39,14 +39,14 @@
 #include <sys/ioctl.h>
 #include <sys/types.h>
 
-#define __BIONIC_TERMIOS_INLINE static inline
+#define __BIONIC_TERMIOS_INLINE static __inline
 #include <bits/termios_inlines.h>
 
 #endif
 
 #if __ANDROID_API__ < 35
 
-#define __BIONIC_TERMIOS_WINSIZE_INLINE static inline
+#define __BIONIC_TERMIOS_WINSIZE_INLINE static __inline
 #include <bits/termios_winsize_inlines.h>
 
 #endif
diff --git a/libc/include/android/legacy_threads_inlines.h b/libc/include/android/legacy_threads_inlines.h
index 06e7438..c614cd0 100644
--- a/libc/include/android/legacy_threads_inlines.h
+++ b/libc/include/android/legacy_threads_inlines.h
@@ -32,7 +32,7 @@
 
 #if __ANDROID_API__ < 30
 
-#define __BIONIC_THREADS_INLINE static inline
+#define __BIONIC_THREADS_INLINE static __inline
 #include <bits/threads_inlines.h>
 
 #endif
diff --git a/libc/include/android/legacy_unistd_inlines.h b/libc/include/android/legacy_unistd_inlines.h
index ac9f3b3..4a5206b 100644
--- a/libc/include/android/legacy_unistd_inlines.h
+++ b/libc/include/android/legacy_unistd_inlines.h
@@ -32,7 +32,7 @@
 
 #if __ANDROID_API__ < 28
 
-#define __BIONIC_SWAB_INLINE static inline
+#define __BIONIC_SWAB_INLINE static __inline
 #include <bits/swab.h>
 
 #endif
diff --git a/libc/include/bits/stdatomic.h b/libc/include/bits/stdatomic.h
index 8df86e2..c74eafd 100644
--- a/libc/include/bits/stdatomic.h
+++ b/libc/include/bits/stdatomic.h
@@ -138,11 +138,11 @@
  * 7.17.4 Fences.
  */
 
-static inline void atomic_thread_fence(memory_order __order __attribute__((__unused__))) {
+static __inline void atomic_thread_fence(memory_order __order __attribute__((__unused__))) {
 	__c11_atomic_thread_fence(__order);
 }
 
-static inline void atomic_signal_fence(memory_order __order __attribute__((__unused__))) {
+static __inline void atomic_signal_fence(memory_order __order __attribute__((__unused__))) {
 	__c11_atomic_signal_fence(__order);
 }
 
@@ -269,18 +269,18 @@
 
 #define	ATOMIC_FLAG_INIT		{ ATOMIC_VAR_INIT(false) }
 
-static inline bool atomic_flag_test_and_set_explicit(volatile atomic_flag * _Nonnull __object, memory_order __order) {
+static __inline bool atomic_flag_test_and_set_explicit(volatile atomic_flag * _Nonnull __object, memory_order __order) {
 	return (atomic_exchange_explicit(&__object->__flag, 1, __order));
 }
 
-static inline void atomic_flag_clear_explicit(volatile atomic_flag * _Nonnull __object, memory_order __order) {
+static __inline void atomic_flag_clear_explicit(volatile atomic_flag * _Nonnull __object, memory_order __order) {
 	atomic_store_explicit(&__object->__flag, 0, __order);
 }
 
-static inline bool atomic_flag_test_and_set(volatile atomic_flag * _Nonnull __object) {
+static __inline bool atomic_flag_test_and_set(volatile atomic_flag * _Nonnull __object) {
 	return (atomic_flag_test_and_set_explicit(__object, memory_order_seq_cst));
 }
 
-static inline void atomic_flag_clear(volatile atomic_flag * _Nonnull __object) {
+static __inline void atomic_flag_clear(volatile atomic_flag * _Nonnull __object) {
 	atomic_flag_clear_explicit(__object, memory_order_seq_cst);
 }
diff --git a/libc/include/bits/swab.h b/libc/include/bits/swab.h
index ebb7c74..9591c2e 100644
--- a/libc/include/bits/swab.h
+++ b/libc/include/bits/swab.h
@@ -33,7 +33,7 @@
 #include <sys/types.h>
 
 #if !defined(__BIONIC_SWAB_INLINE)
-#define __BIONIC_SWAB_INLINE static inline
+#define __BIONIC_SWAB_INLINE static __inline
 #endif
 
 __BEGIN_DECLS
diff --git a/libc/include/bits/termios_inlines.h b/libc/include/bits/termios_inlines.h
index 702f433..a884b59 100644
--- a/libc/include/bits/termios_inlines.h
+++ b/libc/include/bits/termios_inlines.h
@@ -37,7 +37,7 @@
 #include <linux/termios.h>
 
 #if !defined(__BIONIC_TERMIOS_INLINE)
-#define __BIONIC_TERMIOS_INLINE static inline
+#define __BIONIC_TERMIOS_INLINE static __inline
 #endif
 
 __BEGIN_DECLS
@@ -45,7 +45,7 @@
 // Supporting separate input and output speeds would require an ABI
 // change for `struct termios`.
 
-static inline speed_t cfgetspeed(const struct termios* _Nonnull s) {
+static __inline speed_t cfgetspeed(const struct termios* _Nonnull s) {
   return __BIONIC_CAST(static_cast, speed_t, s->c_cflag & CBAUD);
 }
 
diff --git a/libc/include/bits/termios_winsize_inlines.h b/libc/include/bits/termios_winsize_inlines.h
index 0d188e7..ae246e4 100644
--- a/libc/include/bits/termios_winsize_inlines.h
+++ b/libc/include/bits/termios_winsize_inlines.h
@@ -36,7 +36,7 @@
 #include <linux/termios.h>
 
 #if !defined(__BIONIC_TERMIOS_WINSIZE_INLINE)
-#define __BIONIC_TERMIOS_WINSIZE_INLINE static inline
+#define __BIONIC_TERMIOS_WINSIZE_INLINE static __inline
 #endif
 
 __BEGIN_DECLS
diff --git a/libc/include/bits/threads_inlines.h b/libc/include/bits/threads_inlines.h
index 074e1ca..5878e0a 100644
--- a/libc/include/bits/threads_inlines.h
+++ b/libc/include/bits/threads_inlines.h
@@ -38,7 +38,7 @@
 
 __BEGIN_DECLS
 
-static inline int __bionic_thrd_error(int __pthread_code) {
+static __inline int __bionic_thrd_error(int __pthread_code) {
   switch (__pthread_code) {
     case 0: return 0;
     case ENOMEM: return thrd_nomem;
diff --git a/libc/include/ctype.h b/libc/include/ctype.h
index 5cad412..c15ee56 100644
--- a/libc/include/ctype.h
+++ b/libc/include/ctype.h
@@ -42,7 +42,7 @@
  * also provide actual symbols for any caller that needs them.
  */
 #if !defined(__BIONIC_CTYPE_INLINE)
-#define __BIONIC_CTYPE_INLINE static inline
+#define __BIONIC_CTYPE_INLINE static __inline
 #endif
 
 /** Internal implementation detail. Do not use. */
diff --git a/libc/include/strings.h b/libc/include/strings.h
index 6ec3bdf..2f4f764 100644
--- a/libc/include/strings.h
+++ b/libc/include/strings.h
@@ -50,7 +50,7 @@
 #include <bits/strcasecmp.h>
 
 #if !defined(__BIONIC_STRINGS_INLINE)
-#define __BIONIC_STRINGS_INLINE static inline
+#define __BIONIC_STRINGS_INLINE static __inline
 #endif
 
 #undef ffs
@@ -61,13 +61,13 @@
 
 /** Deprecated. Use memmove() instead. */
 #define bcopy(b1, b2, len) __bionic_bcopy((b1), (b2), (len))
-static inline __always_inline void __bionic_bcopy(const void* _Nonnull b1, void* _Nonnull b2, size_t len) {
+static __inline__ __always_inline void __bionic_bcopy(const void* _Nonnull b1, void* _Nonnull b2, size_t len) {
   __builtin_memmove(b2, b1, len);
 }
 
 /** Deprecated. Use memset() instead. */
 #define bzero(b, len) __bionic_bzero((b), (len))
-static inline __always_inline void __bionic_bzero(void* _Nonnull b, size_t len) {
+static __inline__ __always_inline void __bionic_bzero(void* _Nonnull b, size_t len) {
   __builtin_memset(b, 0, len);
 }
 
diff --git a/libc/include/sys/cdefs.h b/libc/include/sys/cdefs.h
index 3218d15..7625d38 100644
--- a/libc/include/sys/cdefs.h
+++ b/libc/include/sys/cdefs.h
@@ -260,7 +260,7 @@
  * them available externally. FORTIFY'ed functions try to be as close to possible as 'invisible';
  * having stack protectors detracts from that (b/182948263).
  */
-#  define __BIONIC_FORTIFY_INLINE static inline __attribute__((__no_stack_protector__)) \
+#  define __BIONIC_FORTIFY_INLINE static __inline__ __attribute__((__no_stack_protector__)) \
       __always_inline __VERSIONER_FORTIFY_INLINE
 /*
  * We should use __BIONIC_FORTIFY_VARIADIC instead of __BIONIC_FORTIFY_INLINE
@@ -268,7 +268,7 @@
  * The __always_inline attribute is useless, misleading, and could trigger
  * clang compiler bug to incorrectly inline variadic functions.
  */
-#  define __BIONIC_FORTIFY_VARIADIC static inline
+#  define __BIONIC_FORTIFY_VARIADIC static __inline__
 /* Error functions don't have bodies, so they can just be static. */
 #  define __BIONIC_ERROR_FUNCTION_VISIBILITY static __attribute__((__unused__))
 #else