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um: harddog: fix modular build

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Since we no longer (want to) export any libc symbols the
_user portions of any drivers need to be built into image
rather than the module. I missed this for the watchdog.
Fix the watchdog accordingly.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Johannes Berg 2023-04-25 10:38:37 +02:00 committed by Richard Weinberger
parent ac9a78681b
commit 73a23d7710
5 changed files with 23 additions and 7 deletions
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4
arch/um/drivers/Makefile
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@ -16,7 +16,8 @@ mconsole-objs := mconsole_kern.o mconsole_user.o
hostaudio-objs := hostaudio_kern.o
ubd-objs := ubd_kern.o ubd_user.o
port-objs := port_kern.o port_user.o
harddog-objs := harddog_kern.o harddog_user.o
harddog-objs := harddog_kern.o
harddog-builtin-$(CONFIG_UML_WATCHDOG) := harddog_user.o harddog_user_exp.o
rtc-objs := rtc_kern.o rtc_user.o
LDFLAGS_pcap.o = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
@ -60,6 +61,7 @@ obj-$(CONFIG_PTY_CHAN) += pty.o
obj-$(CONFIG_TTY_CHAN) += tty.o
obj-$(CONFIG_XTERM_CHAN) += xterm.o xterm_kern.o
obj-$(CONFIG_UML_WATCHDOG) += harddog.o
obj-y += $(harddog-builtin-y) $(harddog-builtin-m)
obj-$(CONFIG_BLK_DEV_COW_COMMON) += cow_user.o
obj-$(CONFIG_UML_RANDOM) += random.o
obj-$(CONFIG_VIRTIO_UML) += virtio_uml.o

9
arch/um/drivers/harddog.h Normal file
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@ -0,0 +1,9 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef UM_WATCHDOG_H
#define UM_WATCHDOG_H
int start_watchdog(int *in_fd_ret, int *out_fd_ret, char *sock);
void stop_watchdog(int in_fd, int out_fd);
int ping_watchdog(int fd);
#endif /* UM_WATCHDOG_H */

7
arch/um/drivers/harddog_kern.c
View File

@ -47,6 +47,7 @@
#include <linux/spinlock.h>
#include <linux/uaccess.h>
#include "mconsole.h"
#include "harddog.h"
MODULE_LICENSE("GPL");
@ -60,8 +61,6 @@ static int harddog_out_fd = -1;
* Allow only one person to hold it open
*/
extern int start_watchdog(int *in_fd_ret, int *out_fd_ret, char *sock);
static int harddog_open(struct inode *inode, struct file *file)
{
int err = -EBUSY;
@ -92,8 +91,6 @@ static int harddog_open(struct inode *inode, struct file *file)
return err;
}
extern void stop_watchdog(int in_fd, int out_fd);
static int harddog_release(struct inode *inode, struct file *file)
{
/*
@ -112,8 +109,6 @@ static int harddog_release(struct inode *inode, struct file *file)
return 0;
}
extern int ping_watchdog(int fd);
static ssize_t harddog_write(struct file *file, const char __user *data, size_t len,
loff_t *ppos)
{

1
arch/um/drivers/harddog_user.c
View File

@ -7,6 +7,7 @@
#include <unistd.h>
#include <errno.h>
#include <os.h>
#include "harddog.h"
struct dog_data {
int stdin_fd;

9
arch/um/drivers/harddog_user_exp.c Normal file
View File

@ -0,0 +1,9 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/export.h>
#include "harddog.h"
#if IS_MODULE(CONFIG_UML_WATCHDOG)
EXPORT_SYMBOL(start_watchdog);
EXPORT_SYMBOL(stop_watchdog);
EXPORT_SYMBOL(ping_watchdog);
#endif