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Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

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Pull arch/tile (really asm-generic) update from Chris Metcalf:
 "These are a couple of asm-generic changes that apply to tile."

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  compat: use sys_sendfile64() implementation for sendfile syscall
  [PATCH v3] ipc: provide generic compat versions of IPC syscalls
This commit is contained in:
Linus Torvalds 2012-03-29 14:49:45 -07:00
commit 50483c3268
11 changed files with 84 additions and 62 deletions
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3
arch/Kconfig
View File

@ -213,4 +213,7 @@ config HAVE_CMPXCHG_LOCAL
config HAVE_CMPXCHG_DOUBLE
bool
config ARCH_WANT_OLD_COMPAT_IPC
bool
source "kernel/gcov/Kconfig"

1
arch/mips/Kconfig
View File

@ -2457,6 +2457,7 @@ config MIPS32_COMPAT
config COMPAT
bool
depends on MIPS32_COMPAT
select ARCH_WANT_OLD_COMPAT_IPC
default y
config SYSVIPC_COMPAT

1
arch/powerpc/Kconfig
View File

@ -154,6 +154,7 @@ config COMPAT
bool
default y if PPC64
select COMPAT_BINFMT_ELF
select ARCH_WANT_OLD_COMPAT_IPC
config SYSVIPC_COMPAT
bool

1
arch/s390/Kconfig
View File

@ -219,6 +219,7 @@ config COMPAT
prompt "Kernel support for 31 bit emulation"
depends on 64BIT
select COMPAT_BINFMT_ELF
select ARCH_WANT_OLD_COMPAT_IPC
help
Select this option if you want to enable your system kernel to
handle system-calls from ELF binaries for 31 bit ESA. This option

1
arch/sparc/Kconfig
View File

@ -577,6 +577,7 @@ config COMPAT
depends on SPARC64
default y
select COMPAT_BINFMT_ELF
select ARCH_WANT_OLD_COMPAT_IPC
config SYSVIPC_COMPAT
bool

11
arch/tile/include/asm/compat.h
View File

@ -242,17 +242,6 @@ long compat_sys_fallocate(int fd, int mode,
long compat_sys_sched_rr_get_interval(compat_pid_t pid,
struct compat_timespec __user *interval);
/* Versions of compat functions that differ from generic Linux. */
struct compat_msgbuf;
long tile_compat_sys_msgsnd(int msqid,
struct compat_msgbuf __user *msgp,
size_t msgsz, int msgflg);
long tile_compat_sys_msgrcv(int msqid,
struct compat_msgbuf __user *msgp,
size_t msgsz, long msgtyp, int msgflg);
long tile_compat_sys_ptrace(compat_long_t request, compat_long_t pid,
compat_long_t addr, compat_long_t data);
/* Tilera Linux syscalls that don't have "compat" versions. */
#define compat_sys_flush_cache sys_flush_cache

43
arch/tile/kernel/compat.c
View File

@ -16,7 +16,6 @@
#define __SYSCALL_COMPAT
#include <linux/compat.h>
#include <linux/msg.h>
#include <linux/syscalls.h>
#include <linux/kdev_t.h>
#include <linux/fs.h>
@ -95,52 +94,10 @@ long compat_sys_sched_rr_get_interval(compat_pid_t pid,
return ret;
}
/*
* The usual compat_sys_msgsnd() and _msgrcv() seem to be assuming
* some different calling convention than our normal 32-bit tile code.
*/
/* Already defined in ipc/compat.c, but we need it here. */
struct compat_msgbuf {
compat_long_t mtype;
char mtext[1];
};
long tile_compat_sys_msgsnd(int msqid,
struct compat_msgbuf __user *msgp,
size_t msgsz, int msgflg)
{
compat_long_t mtype;
if (get_user(mtype, &msgp->mtype))
return -EFAULT;
return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg);
}
long tile_compat_sys_msgrcv(int msqid,
struct compat_msgbuf __user *msgp,
size_t msgsz, long msgtyp, int msgflg)
{
long err, mtype;
err = do_msgrcv(msqid, &mtype, msgp->mtext, msgsz, msgtyp, msgflg);
if (err < 0)
goto out;
if (put_user(mtype, &msgp->mtype))
err = -EFAULT;
out:
return err;
}
/* Provide the compat syscall number to call mapping. */
#undef __SYSCALL
#define __SYSCALL(nr, call) [nr] = (call),
/* The generic versions of these don't work for Tile. */
#define compat_sys_msgrcv tile_compat_sys_msgrcv
#define compat_sys_msgsnd tile_compat_sys_msgsnd
/* See comments in sys.c */
#define compat_sys_fadvise64_64 sys32_fadvise64_64
#define compat_sys_readahead sys32_readahead

1
arch/x86/Kconfig
View File

@ -2177,6 +2177,7 @@ config IA32_AOUT
config COMPAT
def_bool y
depends on IA32_EMULATION
select ARCH_WANT_OLD_COMPAT_IPC
config COMPAT_FOR_U64_ALIGNMENT
def_bool COMPAT

2
include/asm-generic/unistd.h
View File

@ -218,7 +218,7 @@ __SC_COMP(__NR_pwritev, sys_pwritev, compat_sys_pwritev)
/* fs/sendfile.c */
#define __NR3264_sendfile 71
__SC_3264(__NR3264_sendfile, sys_sendfile64, sys_sendfile)
__SYSCALL(__NR3264_sendfile, sys_sendfile64)
/* fs/select.c */
#define __NR_pselect6 72

12
include/linux/compat.h
View File

@ -224,6 +224,7 @@ struct compat_sysinfo;
struct compat_sysctl_args;
struct compat_kexec_segment;
struct compat_mq_attr;
struct compat_msgbuf;
extern void compat_exit_robust_list(struct task_struct *curr);
@ -234,13 +235,22 @@ asmlinkage long
compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
compat_size_t __user *len_ptr);
#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
long compat_sys_semctl(int first, int second, int third, void __user *uptr);
long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
int version, void __user *uptr);
long compat_sys_msgctl(int first, int second, void __user *uptr);
long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
void __user *uptr);
#else
long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
size_t msgsz, int msgflg);
long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
size_t msgsz, long msgtyp, int msgflg);
long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
#endif
long compat_sys_msgctl(int first, int second, void __user *uptr);
long compat_sys_shmctl(int first, int second, void __user *uptr);
long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
unsigned nsems, const struct compat_timespec __user *timeout);

70
ipc/compat.c
View File

@ -27,6 +27,7 @@
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/syscalls.h>
#include <linux/ptrace.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
@ -117,6 +118,7 @@ extern int sem_ctls[];
static inline int compat_ipc_parse_version(int *cmd)
{
#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
int version = *cmd & IPC_64;
/* this is tricky: architectures that have support for the old
@ -128,6 +130,10 @@ static inline int compat_ipc_parse_version(int *cmd)
*cmd &= ~IPC_64;
#endif
return version;
#else
/* With the asm-generic APIs, we always use the 64-bit versions. */
return IPC_64;
#endif
}
static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
@ -232,10 +238,9 @@ static inline int put_compat_semid_ds(struct semid64_ds *s,
return err;
}
long compat_sys_semctl(int first, int second, int third, void __user *uptr)
static long do_compat_semctl(int first, int second, int third, u32 pad)
{
union semun fourth;
u32 pad;
int err, err2;
struct semid64_ds s64;
struct semid64_ds __user *up64;
@ -243,10 +248,6 @@ long compat_sys_semctl(int first, int second, int third, void __user *uptr)
memset(&s64, 0, sizeof(s64));
if (!uptr)
return -EINVAL;
if (get_user(pad, (u32 __user *) uptr))
return -EFAULT;
if ((third & (~IPC_64)) == SETVAL)
fourth.val = (int) pad;
else
@ -305,6 +306,18 @@ long compat_sys_semctl(int first, int second, int third, void __user *uptr)
return err;
}
#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
long compat_sys_semctl(int first, int second, int third, void __user *uptr)
{
u32 pad;
if (!uptr)
return -EINVAL;
if (get_user(pad, (u32 __user *) uptr))
return -EFAULT;
return do_compat_semctl(first, second, third, pad);
}
long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
{
struct compat_msgbuf __user *up = uptr;
@ -353,6 +366,37 @@ long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
out:
return err;
}
#else
long compat_sys_semctl(int semid, int semnum, int cmd, int arg)
{
return do_compat_semctl(semid, semnum, cmd, arg);
}
long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
size_t msgsz, int msgflg)
{
compat_long_t mtype;
if (get_user(mtype, &msgp->mtype))
return -EFAULT;
return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg);
}
long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
size_t msgsz, long msgtyp, int msgflg)
{
long err, mtype;
err = do_msgrcv(msqid, &mtype, msgp->mtext, msgsz, msgtyp, msgflg);
if (err < 0)
goto out;
if (put_user(mtype, &msgp->mtype))
err = -EFAULT;
out:
return err;
}
#endif
static inline int get_compat_msqid64(struct msqid64_ds *m64,
struct compat_msqid64_ds __user *up64)
@ -470,6 +514,7 @@ long compat_sys_msgctl(int first, int second, void __user *uptr)
return err;
}
#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
void __user *uptr)
{
@ -485,6 +530,19 @@ long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
uaddr = compat_ptr(third);
return put_user(raddr, uaddr);
}
#else
long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg)
{
unsigned long ret;
long err;
err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret);
if (err)
return err;
force_successful_syscall_return();
return (long)ret;
}
#endif
static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
struct compat_shmid64_ds __user *up64)