sparse/parse.c: ignore hotpatch attribute

gcc knows about a new "hotpatch" attribute which sparse can safely ignore,
since it modifies only which code will be generated just like the
"no_instrument_function" attribute.

The gcc hotpatch feature patch:
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=11762b8363737591bfb9c66093bc2edf289b917f

Currently the Linux kernel makes use of this attribute:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=61f552141c9c0e88b3fdc7046265781ffd8fa68a

Without this patch sparse will emit warnings like
"error: attribute 'hotpatch': unknown attribute"

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Christopher Li <sparse@chrisli.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/parse.c b/parse.c
index b43d6835..8afae73d 100644
--- a/parse.c
+++ b/parse.c
@@ -540,6 +540,8 @@ const char *ignored_attributes[] = {
 	"__gnu_inline__",
 	"hot",
 	"__hot__",
+	"hotpatch",
+	"__hotpatch__",
         "leaf",
         "__leaf__",
 	"l1_text",