Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2013 Linaro Limited
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2017 Andes Technology Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/ftrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/memory.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <asm/patch.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #ifdef CONFIG_DYNAMIC_FTRACE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) int ftrace_arch_code_modify_prepare(void) __acquires(&text_mutex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	mutex_lock(&text_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) int ftrace_arch_code_modify_post_process(void) __releases(&text_mutex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	mutex_unlock(&text_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) static int ftrace_check_current_call(unsigned long hook_pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 				     unsigned int *expected)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	unsigned int replaced[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	unsigned int nops[2] = {NOP4, NOP4};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	/* we expect nops at the hook position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	if (!expected)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		expected = nops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	 * Read the text we want to modify;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	 * return must be -EFAULT on read error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	if (copy_from_kernel_nofault(replaced, (void *)hook_pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 			MCOUNT_INSN_SIZE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	 * Make sure it is what we expect it to be;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	 * return must be -EINVAL on failed comparison
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	if (memcmp(expected, replaced, sizeof(replaced))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		pr_err("%p: expected (%08x %08x) but got (%08x %08x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		       (void *)hook_pos, expected[0], expected[1], replaced[0],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		       replaced[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) static int __ftrace_modify_call(unsigned long hook_pos, unsigned long target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 				bool enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	unsigned int call[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	unsigned int nops[2] = {NOP4, NOP4};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	make_call(hook_pos, target, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	/* Replace the auipc-jalr pair at once. Return -EPERM on write error. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	if (patch_text_nosync
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	    ((void *)hook_pos, enable ? call : nops, MCOUNT_INSN_SIZE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	int ret = ftrace_check_current_call(rec->ip, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	return __ftrace_modify_call(rec->ip, addr, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		    unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	unsigned int call[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	make_call(rec->ip, addr, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	ret = ftrace_check_current_call(rec->ip, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	return __ftrace_modify_call(rec->ip, addr, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)  * This is called early on, and isn't wrapped by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)  * ftrace_arch_code_modify_{prepare,post_process}() and therefor doesn't hold
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)  * text_mutex, which triggers a lockdep failure.  SMP isn't running so we could
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)  * just directly poke the text, but it's simpler to just take the lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)  * ourselves.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	int out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	ftrace_arch_code_modify_prepare();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	out = ftrace_make_nop(mod, rec, MCOUNT_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	ftrace_arch_code_modify_post_process();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	return out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int ftrace_update_ftrace_func(ftrace_func_t func)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	int ret = __ftrace_modify_call((unsigned long)&ftrace_call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 				       (unsigned long)func, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		ret = __ftrace_modify_call((unsigned long)&ftrace_regs_call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 					   (unsigned long)func, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) int __init ftrace_dyn_arch_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		       unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	unsigned int call[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	make_call(rec->ip, old_addr, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	ret = ftrace_check_current_call(rec->ip, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	return __ftrace_modify_call(rec->ip, addr, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) #ifdef CONFIG_FUNCTION_GRAPH_TRACER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)  * Most of this function is copied from arm64.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 			   unsigned long frame_pointer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	unsigned long return_hooker = (unsigned long)&return_to_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	unsigned long old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	if (unlikely(atomic_read(&current->tracing_graph_pause)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	 * We don't suffer access faults, so no extra fault-recovery assembly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	 * is needed here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	old = *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	if (!function_graph_enter(old, self_addr, frame_pointer, parent))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		*parent = return_hooker;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) #ifdef CONFIG_DYNAMIC_FTRACE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) extern void ftrace_graph_call(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) int ftrace_enable_ftrace_graph_caller(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	unsigned int call[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	static int init_graph = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	make_call(&ftrace_graph_call, &ftrace_stub, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	 * When enabling graph tracer for the first time, ftrace_graph_call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	 * should contains a call to ftrace_stub.  Once it has been disabled,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	 * the 8-bytes at the position becomes NOPs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	if (init_graph) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		ret = ftrace_check_current_call((unsigned long)&ftrace_graph_call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 						call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		init_graph = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		ret = ftrace_check_current_call((unsigned long)&ftrace_graph_call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 						NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	return __ftrace_modify_call((unsigned long)&ftrace_graph_call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 				    (unsigned long)&prepare_ftrace_return, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) int ftrace_disable_ftrace_graph_caller(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	unsigned int call[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	make_call(&ftrace_graph_call, &prepare_ftrace_return, call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	 * This is to make sure that ftrace_enable_ftrace_graph_caller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	 * did the right thing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	ret = ftrace_check_current_call((unsigned long)&ftrace_graph_call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 					call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	return __ftrace_modify_call((unsigned long)&ftrace_graph_call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 				    (unsigned long)&prepare_ftrace_return, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) #endif /* CONFIG_DYNAMIC_FTRACE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) #endif /* CONFIG_FUNCTION_GRAPH_TRACER */