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Commit 04cf31a7 authored by Michael Ellerman's avatar Michael Ellerman
Browse files

ftrace: Make ftrace_location_range() global 



In order to support live patching on powerpc we would like to call
ftrace_location_range(), so make it global.

Signed-off-by: default avatarTorsten Duwe <duwe@suse.de>
Signed-off-by: default avatarBalbir Singh <bsingharora@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 8c50b72a

include/linux/ftrace.h

+1 −0
Original line number Diff line number Diff line
@@ -455,6 +455,7 @@ int ftrace_update_record(struct dyn_ftrace *rec, int enable); 
int ftrace_test_record(struct dyn_ftrace *rec, int enable);

void ftrace_run_stop_machine(int command);

unsigned long ftrace_location(unsigned long ip);

unsigned long ftrace_location_range(unsigned long start, unsigned long end);

unsigned long ftrace_get_addr_new(struct dyn_ftrace *rec);

unsigned long ftrace_get_addr_curr(struct dyn_ftrace *rec);

kernel/trace/ftrace.c

+13 −1
Original line number Diff line number Diff line
@@ -1533,7 +1533,19 @@ static int ftrace_cmp_recs(const void *a, const void *b) 
	return 0;

}



static unsigned long ftrace_location_range(unsigned long start, unsigned long end)

/**

 * ftrace_location_range - return the first address of a traced location

 *	if it touches the given ip range

 * @start: start of range to search.

 * @end: end of range to search (inclusive). @end points to the last byte

 *	to check.

 *

 * Returns rec->ip if the related ftrace location is a least partly within

 * the given address range. That is, the first address of the instruction

 * that is either a NOP or call to the function tracer. It checks the ftrace

 * internal tables to determine if the address belongs or not.

 */

unsigned long ftrace_location_range(unsigned long start, unsigned long end)

{

	struct ftrace_page *pg;

	struct dyn_ftrace *rec;