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Message-Id: <20210720150950.3669610-5-arnd@kernel.org>
Date: Tue, 20 Jul 2021 17:09:50 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: linux-arch@...r.kernel.org
Cc: Arnd Bergmann <arnd@...db.de>,
Christoph Hellwig <hch@...radead.org>,
Alexander Viro <viro@...iv.linux.org.uk>,
Andrew Morton <akpm@...ux-foundation.org>,
Borislav Petkov <bp@...en8.de>,
Brian Gerst <brgerst@...il.com>,
Eric Biederman <ebiederm@...ssion.com>,
Ingo Molnar <mingo@...nel.org>,
"H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>,
Linux ARM <linux-arm-kernel@...ts.infradead.org>,
linux-kernel@...r.kernel.org, Linux-MM <linux-mm@...ck.org>,
kexec@...ts.infradead.org, Christoph Hellwig <hch@....de>
Subject: [PATCH v4 4/4] compat: remove some compat entry points
From: Arnd Bergmann <arnd@...db.de>
These are all handled correctly when calling the native
system call entry point, so remove the special cases.
Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
arch/arm64/include/asm/unistd32.h | 10 +++---
arch/mips/kernel/syscalls/syscall_n32.tbl | 10 +++---
arch/mips/kernel/syscalls/syscall_o32.tbl | 10 +++---
arch/parisc/kernel/syscalls/syscall.tbl | 8 ++---
arch/powerpc/kernel/syscalls/syscall.tbl | 10 +++---
arch/s390/kernel/syscalls/syscall.tbl | 10 +++---
arch/sparc/kernel/syscalls/syscall.tbl | 10 +++---
arch/x86/entry/syscalls/syscall_32.tbl | 4 +--
arch/x86/entry/syscalls/syscall_64.tbl | 2 +-
include/linux/compat.h | 20 ------------
include/uapi/asm-generic/unistd.h | 10 +++---
kernel/sys_ni.c | 5 ---
mm/mempolicy.c | 37 -----------------------
mm/migrate.c | 13 --------
14 files changed, 42 insertions(+), 117 deletions(-)
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 99ffcafc736c..8a5cf6daf7c0 100644
--- 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 c2d2e19abea8..c42378dbb1c2 100644
--- 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 253f2cd70b6b..5ff8ef9d8a04 100644
--- 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 e26187b9ab87..21be3d200e7b 100644
--- 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 aef2a290e71a..9e237232d108 100644
--- 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 64d51ab5a8b4..81bff2ffe6c0 100644
--- 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 603f5a821502..ea1660a933c0 100644
--- 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 ce763a12311c..f54c006603d6 100644
--- 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 f6b57799c1ea..f3dfb5b97e15 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -397,7 +397,7 @@
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 17b756b4df9e..c699df9b16fd 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -801,26 +801,6 @@ 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 a9d6fcd95f42..cde0439913b4 100644
--- 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 30971b1dd4a9..52c27ecf5ff7 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -291,15 +291,10 @@ COND_SYSCALL(madvise);
COND_SYSCALL(process_madvise);
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 9bc5dabdb7a7..6fdfc8ab6770 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1647,43 +1647,6 @@ 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 60634d2653b9..266ae1837b6a 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1967,19 +1967,6 @@ 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
--
2.29.2
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