switch lseek to COMPAT_SYSCALL_DEFINE

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index e60e386..8153f1a 100644 (file)
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -40,7 +40,7 @@ __SYSCALL(15,  sys_chmod)
 __SYSCALL(16,  sys_lchown16)
 __SYSCALL(17,  sys_ni_syscall)                 /* 17 was sys_break */
 __SYSCALL(18,  sys_ni_syscall)                 /* 18 was sys_stat */
-__SYSCALL(19,  compat_sys_lseek_wrapper)
+__SYSCALL(19,  compat_sys_lseek)
 __SYSCALL(20,  sys_getpid)
 __SYSCALL(21,  compat_sys_mount)
 __SYSCALL(22,  sys_ni_syscall)                 /* 22 was sys_umount */

diff --git a/arch/arm64/kernel/sys32.S b/arch/arm64/kernel/sys32.S
index 6abb057..9416d04 100644 (file)
--- a/arch/arm64/kernel/sys32.S
+++ b/arch/arm64/kernel/sys32.S
@@ -58,11 +58,6 @@ ENDPROC(compat_sys_fstatfs64_wrapper)
  * in registers or that take 32-bit parameters which require sign
  * extension.
  */
-compat_sys_lseek_wrapper:
-       sxtw    x1, w1
-       b       sys_lseek
-ENDPROC(compat_sys_lseek_wrapper)
-
 compat_sys_pread64_wrapper:
        orr     x3, x4, x5, lsl #32
        b       sys_pread64

diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index eca69bb..051c8b9 100644 (file)
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -79,16 +79,6 @@ asmlinkage long sys32_sendfile64(u32 out_fd, u32 in_fd,
                                (loff_t __user *)offset, count);
 }
 
-
-/* lseek() needs a wrapper because 'offset' can be negative, but the top
- * half of the argument has been zeroed by syscall.S.
- */
-
-asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
-{
-       return sys_lseek(fd, offset, origin);
-}
-
 asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
 {
         union semun u;

diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index fc9cab1..d0efc0a 100644 (file)
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -76,7 +76,7 @@
        ENTRY_SAME(socket)
        /* struct stat is MAYBE identical wide and narrow ?? */
        ENTRY_COMP(newstat)
-       ENTRY_DIFF(lseek)
+       ENTRY_COMP(lseek)
        ENTRY_SAME(getpid)              /* 20 */
        /* the 'void * data' parameter may need re-packing in wide */
        ENTRY_COMP(mount)

diff --git a/arch/powerpc/include/asm/systbl.h b/arch/powerpc/include/asm/systbl.h
index d906f33..535b6d8 100644 (file)
--- a/arch/powerpc/include/asm/systbl.h
+++ b/arch/powerpc/include/asm/systbl.h
@@ -22,7 +22,7 @@ SYSCALL_SPU(chmod)
 SYSCALL_SPU(lchown)
 SYSCALL(ni_syscall)
 OLDSYS(stat)
-SYSX_SPU(sys_lseek,ppc32_lseek,sys_lseek)
+COMPAT_SYS_SPU(lseek)
 SYSCALL_SPU(getpid)
 COMPAT_SYS(mount)
 SYSX(sys_ni_syscall,sys_oldumount,sys_oldumount)

diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c
index dbc44ba..5677a36 100644 (file)
--- a/arch/powerpc/kernel/sys_ppc32.c
+++ b/arch/powerpc/kernel/sys_ppc32.c
@@ -146,12 +146,6 @@ asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd,
                            (off_t __user *)offset, count);
 }
 
-off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
-{
-       /* sign extend n */
-       return sys_lseek(fd, (int)offset, origin);
-}
-
 long compat_sys_truncate(const char __user * path, u32 length)
 {
        /* sign extend length */

diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index c14faf3..2b1a3a0 100644 (file)
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -67,12 +67,6 @@ ENTRY(sys32_lchown16_wrapper)
        llgfr   %r4,%r4                 # __kernel_old_uid_emu31_t
        jg      sys32_lchown16          # branch to system call
 
-ENTRY(sys32_lseek_wrapper)
-       llgfr   %r2,%r2                 # unsigned int
-       lgfr    %r3,%r3                 # off_t
-       llgfr   %r4,%r4                 # unsigned int
-       jg      sys_lseek               # branch to system call
-
 #sys32_getpid_wrapper                          # void
 
 ENTRY(sys32_mount_wrapper)

diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index aaac708..0e5262f 100644 (file)
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -27,7 +27,7 @@ SYSCALL(sys_chmod,sys_chmod,sys32_chmod_wrapper)              /* 15 */
 SYSCALL(sys_lchown16,sys_ni_syscall,sys32_lchown16_wrapper)    /* old lchown16 syscall*/
 NI_SYSCALL                                                     /* old break syscall holder */
 NI_SYSCALL                                                     /* old stat syscall holder */
-SYSCALL(sys_lseek,sys_lseek,sys32_lseek_wrapper)
+SYSCALL(sys_lseek,sys_lseek,compat_sys_lseek)
 SYSCALL(sys_getpid,sys_getpid,sys_getpid)                      /* 20 */
 SYSCALL(sys_mount,sys_mount,sys32_mount_wrapper)
 SYSCALL(sys_oldumount,sys_oldumount,sys32_oldumount_wrapper)

diff --git a/arch/sparc/kernel/sys32.S b/arch/sparc/kernel/sys32.S
index 0cfe219..be3d65a 100644 (file)
--- a/arch/sparc/kernel/sys32.S
+++ b/arch/sparc/kernel/sys32.S
@@ -47,7 +47,6 @@ SIGN1(sys32_mq_open, compat_sys_mq_open, %o1)
 SIGN1(sys32_select, compat_sys_select, %o0)
 SIGN3(sys32_futex, compat_sys_futex, %o1, %o2, %o5)
 SIGN2(sys32_sendfile, compat_sys_sendfile, %o0, %o1)
-SIGN1(sys32_lseek, sys_lseek, %o1)
 SIGN1(sys32_recvfrom, compat_sys_recvfrom, %o0)
 SIGN1(sys32_recvmsg, compat_sys_recvmsg, %o0)
 SIGN1(sys32_sendmsg, compat_sys_sendmsg, %o0)

diff --git a/arch/sparc/kernel/systbls_64.S b/arch/sparc/kernel/systbls_64.S
index 6eed194..9ed517c 100644 (file)
--- a/arch/sparc/kernel/systbls_64.S
+++ b/arch/sparc/kernel/systbls_64.S
@@ -21,7 +21,7 @@ sys_call_table32:
 /*0*/  .word sys_restart_syscall, sparc_exit, sys_fork, sys_read, sys_write
 /*5*/  .word compat_sys_open, sys_close, compat_sys_wait4, sys_creat, sys_link
 /*10*/  .word sys_unlink, sunos_execv, sys_chdir, sys_chown16, sys_mknod
-/*15*/ .word sys_chmod, sys_lchown16, sys_brk, sys_nis_syscall, sys32_lseek
+/*15*/ .word sys_chmod, sys_lchown16, sys_brk, sys_nis_syscall, compat_sys_lseek
 /*20*/ .word sys_getpid, sys_capget, sys_capset, sys_setuid16, sys_getuid16
 /*25*/ .word sys32_vmsplice, compat_sys_ptrace, sys_alarm, compat_sys_sigaltstack, sys_pause
 /*30*/ .word compat_sys_utime, sys_lchown, sys_fchown, sys_access, sys_nice

diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
index 592f5a9..ad7a20c 100644 (file)
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/ia32/sys_ia32.c
@@ -218,11 +218,6 @@ asmlinkage long sys32_sendfile(int out_fd, int in_fd,
  * Some system calls that need sign extended arguments. This could be
  * done by a generic wrapper.
  */
-long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
-{
-       return sys_lseek(fd, offset, whence);
-}
-
 long sys32_kill(int pid, int sig)
 {
        return sys_kill(pid, sig);

diff --git a/arch/x86/include/asm/sys_ia32.h b/arch/x86/include/asm/sys_ia32.h
index 0218d91..8459efc 100644 (file)
--- a/arch/x86/include/asm/sys_ia32.h
+++ b/arch/x86/include/asm/sys_ia32.h
@@ -43,7 +43,6 @@ asmlinkage long sys32_pwrite(unsigned int, const char __user *, u32, u32, u32);
 asmlinkage long sys32_personality(unsigned long);
 asmlinkage long sys32_sendfile(int, int, compat_off_t __user *, s32);
 
-long sys32_lseek(unsigned int, int, unsigned int);
 long sys32_kill(int, int);
 long sys32_fadvise64_64(int, __u32, __u32, __u32, __u32, int);
 long sys32_vm86_warning(void);

diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
index f2fe78f..f51810b 100644 (file)
--- a/arch/x86/syscalls/syscall_32.tbl
+++ b/arch/x86/syscalls/syscall_32.tbl
@@ -25,7 +25,7 @@
 16     i386    lchown                  sys_lchown16
 17     i386    break
 18     i386    oldstat                 sys_stat
-19     i386    lseek                   sys_lseek                       sys32_lseek
+19     i386    lseek                   sys_lseek                       compat_sys_lseek
 20     i386    getpid                  sys_getpid
 21     i386    mount                   sys_mount                       compat_sys_mount
 22     i386    umount                  sys_oldumount

diff --git a/fs/read_write.c b/fs/read_write.c
index bb34af3..e57796c 100644 (file)
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -15,6 +15,7 @@
 #include <linux/syscalls.h>
 #include <linux/pagemap.h>
 #include <linux/splice.h>
+#include <linux/compat.h>
 #include "read_write.h"
 
 #include <asm/uaccess.h>
@@ -247,6 +248,13 @@ SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, whence)
        return retval;
 }
 
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE3(lseek, unsigned int, fd, compat_off_t, offset, unsigned int, whence)
+{
+       return sys_lseek(fd, offset, whence);
+}
+#endif
+
 #ifdef __ARCH_WANT_SYS_LLSEEK
 SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high,
                unsigned long, offset_low, loff_t __user *, result,
@@ -278,7 +286,6 @@ out_putf:
 }
 #endif
 
-
 /*
  * rw_verify_area doesn't like huge counts. We limit
  * them to something that fits in "int" so that others

diff --git a/include/linux/compat.h b/include/linux/compat.h
index de095b0..59c7204 100644 (file)
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -359,6 +359,7 @@ asmlinkage ssize_t compat_sys_preadv(unsigned long fd,
 asmlinkage ssize_t compat_sys_pwritev(unsigned long fd,
                const struct compat_iovec __user *vec,
                unsigned long vlen, u32 pos_low, u32 pos_high);
+asmlinkage long comat_sys_lseek(unsigned int, compat_off_t, unsigned int);
 
 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
                     const compat_uptr_t __user *envp);