[PATCH 23/46] init.h, lto: mark initcalls as __noreorder

Jiri Slaby (SUSE)
2022-11-14T11:46:22Z

From: Andi Kleen <ak@linux.intel.com>

Kernels don't like any reordering of initcalls between files, as several
initcalls depend on each other. LTO is allowed to reorder as it wishes
and previously needed to use -fno-toplevel-reordering to prevent boot
failures. Now we can use __noreorder per symbol. So mark initcall
functions as such.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Martin Liska <mliska@suse.cz>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
include/linux/init.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/init.h b/include/linux/init.h
index 077d7f93b402..ca827e2fb0da 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -246,7 +246,7 @@ extern bool initcall_debug;
static_assert(__same_type(initcall_t, &fn));
#else
#define ____define_initcall(fn, __unused, __name, __sec) \
- static initcall_t __name __used \
+ static initcall_t __name __used __noreorder \
__attribute__((__section__(__sec))) = fn;
#endif

--
2.38.1