selftests: bpf: standardize to static __always_inline

The progs for bpf selftests use several different notations to force
function inlining. Standardize to what most of them use,
static __always_inline.
Suggested-by: Song Liu <liu.song.a23@gmail.com>
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

tools/testing/selftests/bpf/progs/pyperf.h

@@ -75,8 +75,7 @@ typedef struct {
 	void* co_name; // PyCodeObject.co_name
 } FrameData;
 
-static inline __attribute__((__always_inline__)) void*
-get_thread_state(void* tls_base, PidData* pidData)
+static __always_inline void *get_thread_state(void *tls_base, PidData *pidData)
 {
 	void* thread_state;
 	int key;
@@ -87,8 +86,8 @@ get_thread_state(void* tls_base, PidData* pidData)
 	return thread_state;
 }
 
-static inline __attribute__((__always_inline__)) bool
-get_frame_data(void* frame_ptr, PidData* pidData, FrameData* frame, Symbol* symbol)
+static __always_inline bool get_frame_data(void *frame_ptr, PidData *pidData,
+					   FrameData *frame, Symbol *symbol)
 {
 	// read data from PyFrameObject
 	bpf_probe_read(&frame->f_back,
@@ -161,7 +160,7 @@ struct bpf_elf_map SEC("maps") stackmap = {
 	.max_elem = 1000,
 };
 
-static inline __attribute__((__always_inline__)) int __on_event(struct pt_regs *ctx)
+static __always_inline int __on_event(struct pt_regs *ctx)
 {
 	uint64_t pid_tgid = bpf_get_current_pid_tgid();
 	pid_t pid = (pid_t)(pid_tgid >> 32);

tools/testing/selftests/bpf/progs/strobemeta.h

@@ -266,8 +266,8 @@ struct tls_index {
 	uint64_t offset;
 };
 
-static inline __attribute__((always_inline))
-void *calc_location(struct strobe_value_loc *loc, void *tls_base)
+static __always_inline void *calc_location(struct strobe_value_loc *loc,
+					   void *tls_base)
 {
 	/*
 	 * tls_mode value is:
@@ -327,8 +327,8 @@ void *calc_location(struct strobe_value_loc *loc, void *tls_base)
 		: NULL;
 }
 
-static inline __attribute__((always_inline))
-void read_int_var(struct strobemeta_cfg *cfg, size_t idx, void *tls_base,
+static __always_inline void read_int_var(struct strobemeta_cfg *cfg,
+					 size_t idx, void *tls_base,
 					 struct strobe_value_generic *value,
 					 struct strobemeta_payload *data)
 {
@@ -342,10 +342,11 @@ void read_int_var(struct strobemeta_cfg *cfg, size_t idx, void *tls_base,
 		data->int_vals_set_mask |= (1 << idx);
 }
 
-static inline __attribute__((always_inline))
-uint64_t read_str_var(struct strobemeta_cfg* cfg, size_t idx, void *tls_base,
+static __always_inline uint64_t read_str_var(struct strobemeta_cfg *cfg,
+					     size_t idx, void *tls_base,
 					     struct strobe_value_generic *value,
-		      struct strobemeta_payload *data, void *payload)
+					     struct strobemeta_payload *data,
+					     void *payload)
 {
 	void *location;
 	uint32_t len;
@@ -371,10 +372,11 @@ uint64_t read_str_var(struct strobemeta_cfg* cfg, size_t idx, void *tls_base,
 	return len;
 }
 
-static inline __attribute__((always_inline))
-void *read_map_var(struct strobemeta_cfg *cfg, size_t idx, void *tls_base,
+static __always_inline void *read_map_var(struct strobemeta_cfg *cfg,
+					  size_t idx, void *tls_base,
 					  struct strobe_value_generic *value,
-		   struct strobemeta_payload* data, void *payload)
+					  struct strobemeta_payload *data,
+					  void *payload)
 {
 	struct strobe_map_descr* descr = &data->map_descrs[idx];
 	struct strobe_map_raw map;
@@ -435,9 +437,9 @@ void *read_map_var(struct strobemeta_cfg *cfg, size_t idx, void *tls_base,
  * read_strobe_meta returns NULL, if no metadata was read; otherwise returns
  * pointer to *right after* payload ends
  */
-static inline __attribute__((always_inline))
-void *read_strobe_meta(struct task_struct* task,
-		       struct strobemeta_payload* data) {
+static __always_inline void *read_strobe_meta(struct task_struct *task,
+					      struct strobemeta_payload *data)
+{
 	pid_t pid = bpf_get_current_pid_tgid() >> 32;
 	struct strobe_value_generic value = {0};
 	struct strobemeta_cfg *cfg;

tools/testing/selftests/bpf/progs/test_jhash.h

 // SPDX-License-Identifier: GPL-2.0
 // Copyright (c) 2019 Facebook
+#include <features.h>
 
 typedef unsigned int u32;
 
-static __attribute__((always_inline)) u32 rol32(u32 word, unsigned int shift)
+static __always_inline u32 rol32(u32 word, unsigned int shift)
 {
 	return (word << shift) | (word >> ((-shift) & 31));
 }

tools/testing/selftests/bpf/progs/test_seg6_loop.c

@@ -54,7 +54,7 @@ struct sr6_tlv_t {
 	unsigned char value[0];
 } BPF_PACKET_HEADER;
 
-static __attribute__((always_inline)) struct ip6_srh_t *get_srh(struct __sk_buff *skb)
+static __always_inline struct ip6_srh_t *get_srh(struct __sk_buff *skb)
 {
 	void *cursor, *data_end;
 	struct ip6_srh_t *srh;
@@ -88,9 +88,9 @@ static __attribute__((always_inline)) struct ip6_srh_t *get_srh(struct __sk_buff
 	return srh;
 }
 
-static __attribute__((always_inline))
-int update_tlv_pad(struct __sk_buff *skb, uint32_t new_pad,
-		   uint32_t old_pad, uint32_t pad_off)
+static __always_inline int update_tlv_pad(struct __sk_buff *skb,
+					  uint32_t new_pad, uint32_t old_pad,
+					  uint32_t pad_off)
 {
 	int err;
 
@@ -118,9 +118,10 @@ int update_tlv_pad(struct __sk_buff *skb, uint32_t new_pad,
 	return 0;
 }
 
-static __attribute__((always_inline))
-int is_valid_tlv_boundary(struct __sk_buff *skb, struct ip6_srh_t *srh,
-			  uint32_t *tlv_off, uint32_t *pad_size,
+static __always_inline int is_valid_tlv_boundary(struct __sk_buff *skb,
+						 struct ip6_srh_t *srh,
+						 uint32_t *tlv_off,
+						 uint32_t *pad_size,
 						 uint32_t *pad_off)
 {
 	uint32_t srh_off, cur_off;
@@ -177,8 +178,8 @@ int is_valid_tlv_boundary(struct __sk_buff *skb, struct ip6_srh_t *srh,
 	return 0;
 }
 
-static __attribute__((always_inline))
-int add_tlv(struct __sk_buff *skb, struct ip6_srh_t *srh, uint32_t tlv_off,
+static __always_inline int add_tlv(struct __sk_buff *skb,
+				   struct ip6_srh_t *srh, uint32_t tlv_off,
 				   struct sr6_tlv_t *itlv, uint8_t tlv_size)
 {
 	uint32_t srh_off = (char *)srh - (char *)(long)skb->data;

tools/testing/selftests/bpf/progs/test_verif_scale2.c

@@ -2,7 +2,7 @@
 // Copyright (c) 2019 Facebook
 #include <linux/bpf.h>
 #include "bpf_helpers.h"
-#define ATTR __attribute__((always_inline))
+#define ATTR __always_inline
 #include "test_jhash.h"
 
 SEC("scale90_inline")