compat: remove some compat entry points

These are all handled correctly when calling the native system call entry
point, so remove the special cases.

Link: https://lkml.kernel.org/r/20210727144859.4150043-6-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 4e99e4b..844f6ae 100644 (file)
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -649,11 +649,11 @@ __SYSCALL(__NR_inotify_add_watch, sys_inotify_add_watch)
 #define __NR_inotify_rm_watch 318
 __SYSCALL(__NR_inotify_rm_watch, sys_inotify_rm_watch)
 #define __NR_mbind 319
-__SYSCALL(__NR_mbind, compat_sys_mbind)
+__SYSCALL(__NR_mbind, sys_mbind)
 #define __NR_get_mempolicy 320
-__SYSCALL(__NR_get_mempolicy, compat_sys_get_mempolicy)
+__SYSCALL(__NR_get_mempolicy, sys_get_mempolicy)
 #define __NR_set_mempolicy 321
-__SYSCALL(__NR_set_mempolicy, compat_sys_set_mempolicy)
+__SYSCALL(__NR_set_mempolicy, sys_set_mempolicy)
 #define __NR_openat 322
 __SYSCALL(__NR_openat, compat_sys_openat)
 #define __NR_mkdirat 323
@@ -699,7 +699,7 @@ __SYSCALL(__NR_tee, sys_tee)
 #define __NR_vmsplice 343
 __SYSCALL(__NR_vmsplice, sys_vmsplice)
 #define __NR_move_pages 344
-__SYSCALL(__NR_move_pages, compat_sys_move_pages)
+__SYSCALL(__NR_move_pages, sys_move_pages)
 #define __NR_getcpu 345
 __SYSCALL(__NR_getcpu, sys_getcpu)
 #define __NR_epoll_pwait 346
@@ -811,7 +811,7 @@ __SYSCALL(__NR_rseq, sys_rseq)
 #define __NR_io_pgetevents 399
 __SYSCALL(__NR_io_pgetevents, compat_sys_io_pgetevents)
 #define __NR_migrate_pages 400
-__SYSCALL(__NR_migrate_pages, compat_sys_migrate_pages)
+__SYSCALL(__NR_migrate_pages, sys_migrate_pages)
 #define __NR_kexec_file_load 401
 __SYSCALL(__NR_kexec_file_load, sys_kexec_file_load)
 /* 402 is unused */

diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl
index 56c8d3c..70e32de 100644 (file)
--- a/arch/mips/kernel/syscalls/syscall_n32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n32.tbl
@@ -239,9 +239,9 @@
 228    n32     clock_nanosleep                 sys_clock_nanosleep_time32
 229    n32     tgkill                          sys_tgkill
 230    n32     utimes                          sys_utimes_time32
-231    n32     mbind                           compat_sys_mbind
-232    n32     get_mempolicy                   compat_sys_get_mempolicy
-233    n32     set_mempolicy                   compat_sys_set_mempolicy
+231    n32     mbind                           sys_mbind
+232    n32     get_mempolicy                   sys_get_mempolicy
+233    n32     set_mempolicy                   sys_set_mempolicy
 234    n32     mq_open                         compat_sys_mq_open
 235    n32     mq_unlink                       sys_mq_unlink
 236    n32     mq_timedsend                    sys_mq_timedsend_time32
@@ -258,7 +258,7 @@
 247    n32     inotify_init                    sys_inotify_init
 248    n32     inotify_add_watch               sys_inotify_add_watch
 249    n32     inotify_rm_watch                sys_inotify_rm_watch
-250    n32     migrate_pages                   compat_sys_migrate_pages
+250    n32     migrate_pages                   sys_migrate_pages
 251    n32     openat                          sys_openat
 252    n32     mkdirat                         sys_mkdirat
 253    n32     mknodat                         sys_mknodat
@@ -279,7 +279,7 @@
 268    n32     sync_file_range                 sys_sync_file_range
 269    n32     tee                             sys_tee
 270    n32     vmsplice                        sys_vmsplice
-271    n32     move_pages                      compat_sys_move_pages
+271    n32     move_pages                      sys_move_pages
 272    n32     set_robust_list                 compat_sys_set_robust_list
 273    n32     get_robust_list                 compat_sys_get_robust_list
 274    n32     kexec_load                      compat_sys_kexec_load

diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl
index 201237f..a61c35e 100644 (file)
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -279,9 +279,9 @@
 265    o32     clock_nanosleep                 sys_clock_nanosleep_time32
 266    o32     tgkill                          sys_tgkill
 267    o32     utimes                          sys_utimes_time32
-268    o32     mbind                           sys_mbind                       compat_sys_mbind
-269    o32     get_mempolicy                   sys_get_mempolicy               compat_sys_get_mempolicy
-270    o32     set_mempolicy                   sys_set_mempolicy               compat_sys_set_mempolicy
+268    o32     mbind                           sys_mbind
+269    o32     get_mempolicy                   sys_get_mempolicy
+270    o32     set_mempolicy                   sys_set_mempolicy
 271    o32     mq_open                         sys_mq_open                     compat_sys_mq_open
 272    o32     mq_unlink                       sys_mq_unlink
 273    o32     mq_timedsend                    sys_mq_timedsend_time32
@@ -298,7 +298,7 @@
 284    o32     inotify_init                    sys_inotify_init
 285    o32     inotify_add_watch               sys_inotify_add_watch
 286    o32     inotify_rm_watch                sys_inotify_rm_watch
-287    o32     migrate_pages                   sys_migrate_pages               compat_sys_migrate_pages
+287    o32     migrate_pages                   sys_migrate_pages
 288    o32     openat                          sys_openat                      compat_sys_openat
 289    o32     mkdirat                         sys_mkdirat
 290    o32     mknodat                         sys_mknodat
@@ -319,7 +319,7 @@
 305    o32     sync_file_range                 sys_sync_file_range             sys32_sync_file_range
 306    o32     tee                             sys_tee
 307    o32     vmsplice                        sys_vmsplice
-308    o32     move_pages                      sys_move_pages                  compat_sys_move_pages
+308    o32     move_pages                      sys_move_pages
 309    o32     set_robust_list                 sys_set_robust_list             compat_sys_set_robust_list
 310    o32     get_robust_list                 sys_get_robust_list             compat_sys_get_robust_list
 311    o32     kexec_load                      sys_kexec_load                  compat_sys_kexec_load

diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index 0bf854b..bf751e0 100644 (file)
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -292,9 +292,9 @@
 258    32      clock_nanosleep         sys_clock_nanosleep_time32
 258    64      clock_nanosleep         sys_clock_nanosleep
 259    common  tgkill                  sys_tgkill
-260    common  mbind                   sys_mbind                       compat_sys_mbind
-261    common  get_mempolicy           sys_get_mempolicy               compat_sys_get_mempolicy
-262    common  set_mempolicy           sys_set_mempolicy               compat_sys_set_mempolicy
+260    common  mbind                   sys_mbind
+261    common  get_mempolicy           sys_get_mempolicy
+262    common  set_mempolicy           sys_set_mempolicy
 # 263 was vserver
 264    common  add_key                 sys_add_key
 265    common  request_key             sys_request_key
@@ -331,7 +331,7 @@
 292    64      sync_file_range         sys_sync_file_range
 293    common  tee                     sys_tee
 294    common  vmsplice                sys_vmsplice
-295    common  move_pages              sys_move_pages                  compat_sys_move_pages
+295    common  move_pages              sys_move_pages
 296    common  getcpu                  sys_getcpu
 297    common  epoll_pwait             sys_epoll_pwait                 compat_sys_epoll_pwait
 298    common  statfs64                sys_statfs64                    compat_sys_statfs64

diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index 29b55e2..7bef917 100644 (file)
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -330,10 +330,10 @@
 256    64      sys_debug_setcontext            sys_ni_syscall
 256    spu     sys_debug_setcontext            sys_ni_syscall
 # 257 reserved for vserver
-258    nospu   migrate_pages                   sys_migrate_pages               compat_sys_migrate_pages
-259    nospu   mbind                           sys_mbind                       compat_sys_mbind
-260    nospu   get_mempolicy                   sys_get_mempolicy               compat_sys_get_mempolicy
-261    nospu   set_mempolicy                   sys_set_mempolicy               compat_sys_set_mempolicy
+258    nospu   migrate_pages                   sys_migrate_pages
+259    nospu   mbind                           sys_mbind
+260    nospu   get_mempolicy                   sys_get_mempolicy
+261    nospu   set_mempolicy                   sys_set_mempolicy
 262    nospu   mq_open                         sys_mq_open                     compat_sys_mq_open
 263    nospu   mq_unlink                       sys_mq_unlink
 264    32      mq_timedsend                    sys_mq_timedsend_time32
@@ -381,7 +381,7 @@
 298    common  faccessat                       sys_faccessat
 299    common  get_robust_list                 sys_get_robust_list             compat_sys_get_robust_list
 300    common  set_robust_list                 sys_set_robust_list             compat_sys_set_robust_list
-301    common  move_pages                      sys_move_pages                  compat_sys_move_pages
+301    common  move_pages                      sys_move_pages
 302    common  getcpu                          sys_getcpu
 303    nospu   epoll_pwait                     sys_epoll_pwait                 compat_sys_epoll_pwait
 304    32      utimensat                       sys_utimensat_time32

diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index aa9d68b..df5261e 100644 (file)
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -274,9 +274,9 @@
 265  common    statfs64                sys_statfs64                    compat_sys_statfs64
 266  common    fstatfs64               sys_fstatfs64                   compat_sys_fstatfs64
 267  common    remap_file_pages        sys_remap_file_pages            sys_remap_file_pages
-268  common    mbind                   sys_mbind                       compat_sys_mbind
-269  common    get_mempolicy           sys_get_mempolicy               compat_sys_get_mempolicy
-270  common    set_mempolicy           sys_set_mempolicy               compat_sys_set_mempolicy
+268  common    mbind                   sys_mbind                       sys_mbind
+269  common    get_mempolicy           sys_get_mempolicy               sys_get_mempolicy
+270  common    set_mempolicy           sys_set_mempolicy               sys_set_mempolicy
 271  common    mq_open                 sys_mq_open                     compat_sys_mq_open
 272  common    mq_unlink               sys_mq_unlink                   sys_mq_unlink
 273  common    mq_timedsend            sys_mq_timedsend                sys_mq_timedsend_time32
@@ -293,7 +293,7 @@
 284  common    inotify_init            sys_inotify_init                sys_inotify_init
 285  common    inotify_add_watch       sys_inotify_add_watch           sys_inotify_add_watch
 286  common    inotify_rm_watch        sys_inotify_rm_watch            sys_inotify_rm_watch
-287  common    migrate_pages           sys_migrate_pages               compat_sys_migrate_pages
+287  common    migrate_pages           sys_migrate_pages               sys_migrate_pages
 288  common    openat                  sys_openat                      compat_sys_openat
 289  common    mkdirat                 sys_mkdirat                     sys_mkdirat
 290  common    mknodat                 sys_mknodat                     sys_mknodat
@@ -317,7 +317,7 @@
 307  common    sync_file_range         sys_sync_file_range             compat_sys_s390_sync_file_range
 308  common    tee                     sys_tee                         sys_tee
 309  common    vmsplice                sys_vmsplice                    sys_vmsplice
-310  common    move_pages              sys_move_pages                  compat_sys_move_pages
+310  common    move_pages              sys_move_pages                  sys_move_pages
 311  common    getcpu                  sys_getcpu                      sys_getcpu
 312  common    epoll_pwait             sys_epoll_pwait                 compat_sys_epoll_pwait
 313  common    utimes                  sys_utimes                      sys_utimes_time32

diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl
index 7893104..c37764d 100644 (file)
--- a/arch/sparc/kernel/syscalls/syscall.tbl
+++ b/arch/sparc/kernel/syscalls/syscall.tbl
@@ -365,12 +365,12 @@
 299    common  unshare                 sys_unshare
 300    common  set_robust_list         sys_set_robust_list             compat_sys_set_robust_list
 301    common  get_robust_list         sys_get_robust_list             compat_sys_get_robust_list
-302    common  migrate_pages           sys_migrate_pages               compat_sys_migrate_pages
-303    common  mbind                   sys_mbind                       compat_sys_mbind
-304    common  get_mempolicy           sys_get_mempolicy               compat_sys_get_mempolicy
-305    common  set_mempolicy           sys_set_mempolicy               compat_sys_set_mempolicy
+302    common  migrate_pages           sys_migrate_pages
+303    common  mbind                   sys_mbind
+304    common  get_mempolicy           sys_get_mempolicy
+305    common  set_mempolicy           sys_set_mempolicy
 306    common  kexec_load              sys_kexec_load                  compat_sys_kexec_load
-307    common  move_pages              sys_move_pages                  compat_sys_move_pages
+307    common  move_pages              sys_move_pages
 308    common  getcpu                  sys_getcpu
 309    common  epoll_pwait             sys_epoll_pwait                 compat_sys_epoll_pwait
 310    32      utimensat               sys_utimensat_time32

diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index 61f18b7..960a021 100644 (file)
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -286,7 +286,7 @@
 272    i386    fadvise64_64            sys_ia32_fadvise64_64
 273    i386    vserver
 274    i386    mbind                   sys_mbind
-275    i386    get_mempolicy           sys_get_mempolicy               compat_sys_get_mempolicy
+275    i386    get_mempolicy           sys_get_mempolicy
 276    i386    set_mempolicy           sys_set_mempolicy
 277    i386    mq_open                 sys_mq_open                     compat_sys_mq_open
 278    i386    mq_unlink               sys_mq_unlink
@@ -328,7 +328,7 @@
 314    i386    sync_file_range         sys_ia32_sync_file_range
 315    i386    tee                     sys_tee
 316    i386    vmsplice                sys_vmsplice
-317    i386    move_pages              sys_move_pages                  compat_sys_move_pages
+317    i386    move_pages              sys_move_pages
 318    i386    getcpu                  sys_getcpu
 319    i386    epoll_pwait             sys_epoll_pwait
 320    i386    utimensat               sys_utimensat_time32

diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index 807b6a1..18b5500 100644 (file)
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -398,7 +398,7 @@
 530    x32     set_robust_list         compat_sys_set_robust_list
 531    x32     get_robust_list         compat_sys_get_robust_list
 532    x32     vmsplice                sys_vmsplice
-533    x32     move_pages              compat_sys_move_pages
+533    x32     move_pages              sys_move_pages
 534    x32     preadv                  compat_sys_preadv64
 535    x32     pwritev                 compat_sys_pwritev64
 536    x32     rt_tgsigqueueinfo       compat_sys_rt_tgsigqueueinfo

diff --git a/include/linux/compat.h b/include/linux/compat.h
index 3a2ac5a..2d42ceb 100644 (file)
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -799,26 +799,6 @@ asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr
 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
 
 /* mm/, CONFIG_MMU only */
-asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
-                                compat_ulong_t mode,
-                                compat_ulong_t __user *nmask,
-                                compat_ulong_t maxnode, compat_ulong_t flags);
-asmlinkage long compat_sys_get_mempolicy(int __user *policy,
-                                        compat_ulong_t __user *nmask,
-                                        compat_ulong_t maxnode,
-                                        compat_ulong_t addr,
-                                        compat_ulong_t flags);
-asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
-                                        compat_ulong_t maxnode);
-asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
-               compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
-               const compat_ulong_t __user *new_nodes);
-asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
-                                     __u32 __user *pages,
-                                     const int __user *nodes,
-                                     int __user *status,
-                                     int flags);
-
 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
                                        compat_pid_t pid, int sig,
                                        struct compat_siginfo __user *uinfo);

diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index 14c8fe8..1c5fb86 100644 (file)
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -673,15 +673,15 @@ __SYSCALL(__NR_madvise, sys_madvise)
 #define __NR_remap_file_pages 234
 __SYSCALL(__NR_remap_file_pages, sys_remap_file_pages)
 #define __NR_mbind 235
-__SC_COMP(__NR_mbind, sys_mbind, compat_sys_mbind)
+__SYSCALL(__NR_mbind, sys_mbind)
 #define __NR_get_mempolicy 236
-__SC_COMP(__NR_get_mempolicy, sys_get_mempolicy, compat_sys_get_mempolicy)
+__SYSCALL(__NR_get_mempolicy, sys_get_mempolicy)
 #define __NR_set_mempolicy 237
-__SC_COMP(__NR_set_mempolicy, sys_set_mempolicy, compat_sys_set_mempolicy)
+__SYSCALL(__NR_set_mempolicy, sys_set_mempolicy)
 #define __NR_migrate_pages 238
-__SC_COMP(__NR_migrate_pages, sys_migrate_pages, compat_sys_migrate_pages)
+__SYSCALL(__NR_migrate_pages, sys_migrate_pages)
 #define __NR_move_pages 239
-__SC_COMP(__NR_move_pages, sys_move_pages, compat_sys_move_pages)
+__SYSCALL(__NR_move_pages, sys_move_pages)
 #endif
 
 #define __NR_rt_tgsigqueueinfo 240

diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 64578ad..f43d89d 100644 (file)
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -292,15 +292,10 @@ COND_SYSCALL(process_madvise);
 COND_SYSCALL(process_mrelease);
 COND_SYSCALL(remap_file_pages);
 COND_SYSCALL(mbind);
-COND_SYSCALL_COMPAT(mbind);
 COND_SYSCALL(get_mempolicy);
-COND_SYSCALL_COMPAT(get_mempolicy);
 COND_SYSCALL(set_mempolicy);
-COND_SYSCALL_COMPAT(set_mempolicy);
 COND_SYSCALL(migrate_pages);
-COND_SYSCALL_COMPAT(migrate_pages);
 COND_SYSCALL(move_pages);
-COND_SYSCALL_COMPAT(move_pages);
 
 COND_SYSCALL(perf_event_open);
 COND_SYSCALL(accept4);

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index eb95578..8d14240 100644 (file)
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1649,43 +1649,6 @@ SYSCALL_DEFINE5(get_mempolicy, int __user *, policy,
        return kernel_get_mempolicy(policy, nmask, maxnode, addr, flags);
 }
 
-#ifdef CONFIG_COMPAT
-
-COMPAT_SYSCALL_DEFINE5(get_mempolicy, int __user *, policy,
-                      compat_ulong_t __user *, nmask,
-                      compat_ulong_t, maxnode,
-                      compat_ulong_t, addr, compat_ulong_t, flags)
-{
-       return kernel_get_mempolicy(policy, (unsigned long __user *)nmask,
-                                   maxnode, addr, flags);
-}
-
-COMPAT_SYSCALL_DEFINE3(set_mempolicy, int, mode, compat_ulong_t __user *, nmask,
-                      compat_ulong_t, maxnode)
-{
-       return kernel_set_mempolicy(mode, (unsigned long __user *)nmask, maxnode);
-}
-
-COMPAT_SYSCALL_DEFINE6(mbind, compat_ulong_t, start, compat_ulong_t, len,
-                      compat_ulong_t, mode, compat_ulong_t __user *, nmask,
-                      compat_ulong_t, maxnode, compat_ulong_t, flags)
-{
-       return kernel_mbind(start, len, mode, (unsigned long __user *)nmask,
-                           maxnode, flags);
-}
-
-COMPAT_SYSCALL_DEFINE4(migrate_pages, compat_pid_t, pid,
-                      compat_ulong_t, maxnode,
-                      const compat_ulong_t __user *, old_nodes,
-                      const compat_ulong_t __user *, new_nodes)
-{
-       return kernel_migrate_pages(pid, maxnode,
-                                   (const unsigned long __user *)old_nodes,
-                                   (const unsigned long __user *)new_nodes);
-}
-
-#endif /* CONFIG_COMPAT */
-
 bool vma_migratable(struct vm_area_struct *vma)
 {
        if (vma->vm_flags & (VM_IO | VM_PFNMAP))

diff --git a/mm/migrate.c b/mm/migrate.c
index 2bc4948..a6a7743 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2047,19 +2047,6 @@ SYSCALL_DEFINE6(move_pages, pid_t, pid, unsigned long, nr_pages,
        return kernel_move_pages(pid, nr_pages, pages, nodes, status, flags);
 }
 
-#ifdef CONFIG_COMPAT
-COMPAT_SYSCALL_DEFINE6(move_pages, pid_t, pid, compat_ulong_t, nr_pages,
-                      compat_uptr_t __user *, pages,
-                      const int __user *, nodes,
-                      int __user *, status,
-                      int, flags)
-{
-       return kernel_move_pages(pid, nr_pages,
-                                (const void __user *__user *)pages,
-                                nodes, status, flags);
-}
-#endif /* CONFIG_COMPAT */
-
 #ifdef CONFIG_NUMA_BALANCING
 /*
  * Returns true if this is a safe migration target node for misplaced NUMA