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ftrace: Add ftrace_hash_count function

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Adding external ftrace_hash_count function so we could get hash
count outside of ftrace object.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20260606123955.345967-2-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa
2026-06-06 14:39:26 +02:00
committed by Alexei Starovoitov
parent 5b038319be
commit e57f13eaab
2 changed files with 13 additions and 1 deletions
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7
include/linux/ftrace.h
View File

@@ -551,6 +551,8 @@ int update_ftrace_direct_mod(struct ftrace_ops *ops, struct ftrace_hash *hash, b
void ftrace_stub_direct_tramp(void);
unsigned long ftrace_hash_count(struct ftrace_hash *hash);
#else
struct ftrace_ops;
static inline unsigned long ftrace_find_rec_direct(unsigned long ip)
@@ -590,6 +592,11 @@ static inline int update_ftrace_direct_mod(struct ftrace_ops *ops, struct ftrace
return -ENODEV;
}
static inline unsigned long ftrace_hash_count(struct ftrace_hash *hash)
{
return 0;
}
/*
* This must be implemented by the architecture.
* It is the way the ftrace direct_ops helper, when called

7
kernel/trace/ftrace.c
View File

@@ -6288,11 +6288,16 @@ int modify_ftrace_direct(struct ftrace_ops *ops, unsigned long addr)
}
EXPORT_SYMBOL_GPL(modify_ftrace_direct);
static unsigned long hash_count(struct ftrace_hash *hash)
static inline unsigned long hash_count(struct ftrace_hash *hash)
{
return hash ? hash->count : 0;
}
unsigned long ftrace_hash_count(struct ftrace_hash *hash)
{
return hash_count(hash);
}
/**
* hash_add - adds two struct ftrace_hash and returns the result
* @a: struct ftrace_hash object