Commit d721def7 authored by Jiri Olsa's avatar Jiri Olsa Committed by Alexei Starovoitov
Browse files

kallsyms: Make kallsyms_on_each_symbol generally available 



Making kallsyms_on_each_symbol generally available, so it can be
used outside CONFIG_LIVEPATCH option in following changes.

Rather than adding another ifdef option let's make the function
generally available (when CONFIG_KALLSYMS option is defined).

Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20220510122616.2652285-2-jolsa@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 9376d389

include/linux/kallsyms.h

+6 −1
Original line number Diff line number Diff line
@@ -65,11 +65,11 @@ static inline void *dereference_symbol_descriptor(void *ptr) 
	return ptr;

}



#ifdef CONFIG_KALLSYMS

int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,

				      unsigned long),

			    void *data);



#ifdef CONFIG_KALLSYMS

/* Lookup the address for a symbol. Returns 0 if not found. */

unsigned long kallsyms_lookup_name(const char *name);
@@ -163,6 +163,11 @@ static inline bool kallsyms_show_value(const struct cred *cred) 
	return false;

}



static inline int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,

					  unsigned long), void *data)

{

	return -EOPNOTSUPP;

}

#endif /*CONFIG_KALLSYMS*/



static inline void print_ip_sym(const char *loglvl, unsigned long ip)

kernel/kallsyms.c

+0 −2
Original line number Diff line number Diff line
@@ -228,7 +228,6 @@ unsigned long kallsyms_lookup_name(const char *name) 
	return module_kallsyms_lookup_name(name);

}



#ifdef CONFIG_LIVEPATCH

/*

 * Iterate over all symbols in vmlinux.  For symbols from modules use

 * module_kallsyms_on_each_symbol instead.
@@ -251,7 +250,6 @@ int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *, 
	}

	return 0;

}

#endif /* CONFIG_LIVEPATCH */



static unsigned long get_symbol_pos(unsigned long addr,

				    unsigned long *symbolsize,