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ftrace: Make alloc_and_copy_ftrace_hash direct friendly

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Make alloc_and_copy_ftrace_hash to copy also direct address
for each hash entry.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://lore.kernel.org/bpf/20251230145010.103439-3-jolsa@kernel.org
This commit is contained in:
Jiri Olsa 2025-12-30 15:50:03 +01:00 committed by Andrii Nakryiko
parent 4be42c9222
commit 676bfeae7b
1 changed files with 9 additions and 2 deletions
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11
kernel/trace/ftrace.c
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@ -1212,7 +1212,7 @@ static void __add_hash_entry(struct ftrace_hash *hash,
}
static struct ftrace_func_entry *
add_hash_entry(struct ftrace_hash *hash, unsigned long ip)
add_hash_entry_direct(struct ftrace_hash *hash, unsigned long ip, unsigned long direct)
{
struct ftrace_func_entry *entry;
@ -1221,11 +1221,18 @@ add_hash_entry(struct ftrace_hash *hash, unsigned long ip)
return NULL;
entry->ip = ip;
entry->direct = direct;
__add_hash_entry(hash, entry);
return entry;
}
static struct ftrace_func_entry *
add_hash_entry(struct ftrace_hash *hash, unsigned long ip)
{
return add_hash_entry_direct(hash, ip, 0);
}
static void
free_hash_entry(struct ftrace_hash *hash,
struct ftrace_func_entry *entry)
@ -1398,7 +1405,7 @@ alloc_and_copy_ftrace_hash(int size_bits, struct ftrace_hash *hash)
size = 1 << hash->size_bits;
for (i = 0; i < size; i++) {
hlist_for_each_entry(entry, &hash->buckets[i], hlist) {
if (add_hash_entry(new_hash, entry->ip) == NULL)
if (add_hash_entry_direct(new_hash, entry->ip, entry->direct) == NULL)
goto free_hash;
}
}