[PATCH AUTOSEL 4.14 074/123] sched/topology: Fix percpu data types in struct sd_data & struct s_data

Sasha Levin
2019-03-27T18:49:32Z

From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>

[ Upstream commit 99687cdbb3f6c8e32bcc7f37496e811f30460e48 ]

The percpu members of struct sd_data and s_data are declared as:

struct ... ** __percpu member;

So their type is:

__percpu pointer to pointer to struct ...

But looking at how they're used, their type should be:

pointer to __percpu pointer to struct ...

and they should thus be declared as:

struct ... * __percpu *member;

So fix the placement of '__percpu' in the definition of these
structures.

This addresses a bunch of Sparse's warnings like:

warning: incorrect type in initializer (different address spaces)
expected void const [noderef] <asn:3> *__vpp_verify
got struct sched_domain **

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190118144936.79158-1-luc.vanoostenryck@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
include/linux/sched/topology.h | 8 ++++----
kernel/sched/topology.c | 2 +-
2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/linux/sched/topology.h b/include/linux/sched/topology.h
index cf257c2e728d..5a92baa91e0c 100644
--- a/include/linux/sched/topology.h
+++ b/include/linux/sched/topology.h
@@ -177,10 +177,10 @@ typedef int (*sched_domain_flags_f)(void);
#define SDTL_OVERLAP 0x01

struct sd_data {
- struct sched_domain **__percpu sd;
- struct sched_domain_shared **__percpu sds;
- struct sched_group **__percpu sg;
- struct sched_group_capacity **__percpu sgc;
+ struct sched_domain *__percpu *sd;
+ struct sched_domain_shared *__percpu *sds;
+ struct sched_group *__percpu *sg;
+ struct sched_group_capacity *__percpu *sgc;
};

struct sched_domain_topology_level {
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 659e075ef70b..9dcd80ed9d4c 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -499,7 +499,7 @@ static int __init isolated_cpu_setup(char *str)
__setup("isolcpus=", isolated_cpu_setup);

struct s_data {
- struct sched_domain ** __percpu sd;
+ struct sched_domain * __percpu *sd;
struct root_domain *rd;
};

--
2.19.1