mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
![Stephen Rothwell](/assets/img/avatar_default.png)
Stephen Rothewell <sfr@canb.auug.org.au> wrote:
> After merging the userns tree, today's linux-next build (powerpc
> ppc64_defconfig) produced this warning:
>
> In file included from include/linux/sched.h:16:0,
> from arch/powerpc/lib/xor_vmx_glue.c:14:
> include/linux/shm.h:17:35: error: 'struct file' declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
> bool is_file_shm_hugepages(struct file *file);
> ^~~~
>
> and many, many more (most warnings, but some errors - arch/powerpc is
> mostly built with -Werror)
I dug through this and I discovered that the error was caused by the
removal of struct shmid_kernel from shm.h when building on powerpc.
Except for observing the existence of "struct file *shm_file" in
struct shmid_kernel I have no clue why the structure move would cause
such a failure. I suspect shm.h always needed the forward declaration
and someting had been confusing gcc into not issuing the warning. --EWB
Fixes: a2e102cd3c
("shm: Move struct shmid_kernel into ipc/shm.c")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
45 lines
968 B
C
45 lines
968 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_SHM_H_
|
|
#define _LINUX_SHM_H_
|
|
|
|
#include <linux/list.h>
|
|
#include <asm/page.h>
|
|
#include <uapi/linux/shm.h>
|
|
#include <asm/shmparam.h>
|
|
|
|
struct file;
|
|
|
|
#ifdef CONFIG_SYSVIPC
|
|
struct sysv_shm {
|
|
struct list_head shm_clist;
|
|
};
|
|
|
|
long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr,
|
|
unsigned long shmlba);
|
|
bool is_file_shm_hugepages(struct file *file);
|
|
void exit_shm(struct task_struct *task);
|
|
#define shm_init_task(task) INIT_LIST_HEAD(&(task)->sysvshm.shm_clist)
|
|
#else
|
|
struct sysv_shm {
|
|
/* empty */
|
|
};
|
|
|
|
static inline long do_shmat(int shmid, char __user *shmaddr,
|
|
int shmflg, unsigned long *addr,
|
|
unsigned long shmlba)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
static inline bool is_file_shm_hugepages(struct file *file)
|
|
{
|
|
return false;
|
|
}
|
|
static inline void exit_shm(struct task_struct *task)
|
|
{
|
|
}
|
|
static inline void shm_init_task(struct task_struct *task)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif /* _LINUX_SHM_H_ */
|