9 files changed, 277 insertions, 169 deletions

diff --git a/include/asm-generic/audit_change_attr.h b/include/asm-generic/audit_change_attr.h
index bcbab3e4a3b..89b73e5d0fd 100644
--- a/include/asm-generic/audit_change_attr.h
+++ b/include/asm-generic/audit_change_attr.h
@@ -1,4 +1,6 @@
+#ifdef __NR_chmod
 __NR_chmod,
+#endif
 __NR_fchmod,
 #ifdef __NR_chown
 __NR_chown,
@@ -20,7 +22,9 @@ __NR_chown32,
 __NR_fchown32,
 __NR_lchown32,
 #endif
+#ifdef __NR_link
 __NR_link,
+#endif
 #ifdef __NR_linkat
 __NR_linkat,
 #endif
diff --git a/include/asm-generic/audit_dir_write.h b/include/asm-generic/audit_dir_write.h
index 6621bd82cbe..7b61db4fe72 100644
--- a/include/asm-generic/audit_dir_write.h
+++ b/include/asm-generic/audit_dir_write.h
@@ -1,13 +1,27 @@
+#ifdef __NR_rename
 __NR_rename,
+#endif
+#ifdef __NR_mkdir
 __NR_mkdir,
+#endif
+#ifdef __NR_rmdir
 __NR_rmdir,
+#endif
 #ifdef __NR_creat
 __NR_creat,
 #endif
+#ifdef __NR_link
 __NR_link,
+#endif
+#ifdef __NR_unlink
 __NR_unlink,
+#endif
+#ifdef __NR_symlink
 __NR_symlink,
+#endif
+#ifdef __NR_mknod
 __NR_mknod,
+#endif
 #ifdef __NR_mkdirat
 __NR_mkdirat,
 __NR_mknodat,
diff --git a/include/asm-generic/audit_read.h b/include/asm-generic/audit_read.h
index 0e87464d984..3b249cb857d 100644
--- a/include/asm-generic/audit_read.h
+++ b/include/asm-generic/audit_read.h
@@ -1,4 +1,6 @@
+#ifdef __NR_readlink
 __NR_readlink,
+#endif
 __NR_quotactl,
 __NR_listxattr,
 __NR_llistxattr,
@@ -6,3 +8,6 @@ __NR_flistxattr,
 __NR_getxattr,
 __NR_lgetxattr,
 __NR_fgetxattr,
+#ifdef __NR_readlinkat
+__NR_readlinkat,
+#endif
diff --git a/include/asm-generic/audit_write.h b/include/asm-generic/audit_write.h
index c5f1c2c920e..e7020c57b13 100644
--- a/include/asm-generic/audit_write.h
+++ b/include/asm-generic/audit_write.h
@@ -4,7 +4,9 @@ __NR_acct,
 __NR_swapon,
 #endif
 __NR_quotactl,
+#ifdef __NR_truncate
 __NR_truncate,
+#endif
 #ifdef __NR_truncate64
 __NR_truncate64,
 #endif
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index e5a3f588000..91784841e40 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -162,9 +162,46 @@ extern void warn_slowpath_null(const char *file, const int line);
         unlikely(__ret_warn_once);                              \
 })
 
+#ifdef CONFIG_PRINTK
+
 #define WARN_ON_RATELIMIT(condition, state)                     \
                 WARN_ON((condition) && __ratelimit(state))
 
+#define __WARN_RATELIMIT(condition, state, format...)           \
+({                                                              \
+        int rtn = 0;                                            \
+        if (unlikely(__ratelimit(state)))                       \
+                rtn = WARN(condition, format);                  \
+        rtn;                                                    \
+})
+
+#define WARN_RATELIMIT(condition, format...)                    \
+({                                                              \
+        static DEFINE_RATELIMIT_STATE(_rs,                      \
+                                      DEFAULT_RATELIMIT_INTERVAL,       \
+                                      DEFAULT_RATELIMIT_BURST); \
+        __WARN_RATELIMIT(condition, &_rs, format);              \
+})
+
+#else
+
+#define WARN_ON_RATELIMIT(condition, state)                     \
+        WARN_ON(condition)
+
+#define __WARN_RATELIMIT(condition, state, format...)           \
+({                                                              \
+        int rtn = WARN(condition, format);                      \
+        rtn;                                                    \
+})
+
+#define WARN_RATELIMIT(condition, format...)                    \
+({                                                              \
+        int rtn = WARN(condition, format);                      \
+        rtn;                                                    \
+})
+
+#endif
+
 /*
  * WARN_ON_SMP() is for cases that the warning is either
  * meaningless for !SMP or may even cause failures.
diff --git a/include/asm-generic/cacheflush.h b/include/asm-generic/cacheflush.h
index 57b5c3c82e8..87bc536ccde 100644
--- a/include/asm-generic/cacheflush.h
+++ b/include/asm-generic/cacheflush.h
@@ -24,7 +24,10 @@
 #define flush_cache_vunmap(start, end)          do { } while (0)
 
 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
-        memcpy(dst, src, len)
+        do { \
+                memcpy(dst, src, len); \
+                flush_icache_user_range(vma, page, vaddr, len); \
+        } while (0)
 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
         memcpy(dst, src, len)
 
diff --git a/include/asm-generic/resource.h b/include/asm-generic/resource.h
index 587566f95f6..61fa862fe08 100644
--- a/include/asm-generic/resource.h
+++ b/include/asm-generic/resource.h
@@ -78,7 +78,7 @@
         [RLIMIT_CORE]           = {              0,  RLIM_INFINITY },   \
         [RLIMIT_RSS]            = {  RLIM_INFINITY,  RLIM_INFINITY },   \
         [RLIMIT_NPROC]          = {              0,              0 },   \
-        [RLIMIT_NOFILE]         = {       INR_OPEN,       INR_OPEN },   \
+        [RLIMIT_NOFILE]         = {   INR_OPEN_CUR,   INR_OPEN_MAX },   \
         [RLIMIT_MEMLOCK]        = {    MLOCK_LIMIT,    MLOCK_LIMIT },   \
         [RLIMIT_AS]             = {  RLIM_INFINITY,  RLIM_INFINITY },   \
         [RLIMIT_LOCKS]          = {  RLIM_INFINITY,  RLIM_INFINITY },   \
diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h
index e43f9766259..e58fa777fa0 100644
--- a/include/asm-generic/tlb.h
+++ b/include/asm-generic/tlb.h
@@ -5,6 +5,8 @@
  * Copyright 2001 Red Hat, Inc.
  * Based on code from mm/memory.c Copyright Linus Torvalds and others.
  *
+ * Copyright 2011 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
+ *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version
@@ -17,97 +19,111 @@
 #include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 
+#ifdef CONFIG_HAVE_RCU_TABLE_FREE
 /*
- * For UP we don't need to worry about TLB flush
- * and page free order so much..
+ * Semi RCU freeing of the page directories.
+ *
+ * This is needed by some architectures to implement software pagetable walkers.
+ *
+ * gup_fast() and other software pagetable walkers do a lockless page-table
+ * walk and therefore needs some synchronization with the freeing of the page
+ * directories. The chosen means to accomplish that is by disabling IRQs over
+ * the walk.
+ *
+ * Architectures that use IPIs to flush TLBs will then automagically DTRT,
+ * since we unlink the page, flush TLBs, free the page. Since the disabling of
+ * IRQs delays the completion of the TLB flush we can never observe an already
+ * freed page.
+ *
+ * Architectures that do not have this (PPC) need to delay the freeing by some
+ * other means, this is that means.
+ *
+ * What we do is batch the freed directory pages (tables) and RCU free them.
+ * We use the sched RCU variant, as that guarantees that IRQ/preempt disabling
+ * holds off grace periods.
+ *
+ * However, in order to batch these pages we need to allocate storage, this
+ * allocation is deep inside the MM code and can thus easily fail on memory
+ * pressure. To guarantee progress we fall back to single table freeing, see
+ * the implementation of tlb_remove_table_one().
+ *
  */
-#ifdef CONFIG_SMP
-  #ifdef ARCH_FREE_PTR_NR
-    #define FREE_PTR_NR   ARCH_FREE_PTR_NR
-  #else
-    #define FREE_PTE_NR 506
-  #endif
-  #define tlb_fast_mode(tlb) ((tlb)->nr == ~0U)
-#else
-  #define FREE_PTE_NR   1
-  #define tlb_fast_mode(tlb) 1
+struct mmu_table_batch {
+        struct rcu_head         rcu;
+        unsigned int            nr;
+        void                    *tables[0];
+};
+
+#define MAX_TABLE_BATCH         \
+        ((PAGE_SIZE - sizeof(struct mmu_table_batch)) / sizeof(void *))
+
+extern void tlb_table_flush(struct mmu_gather *tlb);
+extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
+
 #endif
 
-/* struct mmu_gather is an opaque type used by the mm code for passing around
- * any data needed by arch specific code for tlb_remove_page.
+/*
+ * If we can't allocate a page to make a big batch of page pointers
+ * to work on, then just handle a few from the on-stack structure.
  */
-struct mmu_gather {
-        struct mm_struct        *mm;
-        unsigned int            nr;     /* set to ~0U means fast mode */
-        unsigned int            need_flush;/* Really unmapped some ptes? */
-        unsigned int            fullmm; /* non-zero means full mm flush */
-        struct page *           pages[FREE_PTE_NR];
+#define MMU_GATHER_BUNDLE       8
+
+struct mmu_gather_batch {
+        struct mmu_gather_batch *next;
+        unsigned int            nr;
+        unsigned int            max;
+        struct page             *pages[0];
 };
 
-/* Users of the generic TLB shootdown code must declare this storage space. */
-DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);
+#define MAX_GATHER_BATCH        \
+        ((PAGE_SIZE - sizeof(struct mmu_gather_batch)) / sizeof(void *))
 
-/* tlb_gather_mmu
- *      Return a pointer to an initialized struct mmu_gather.
+/* struct mmu_gather is an opaque type used by the mm code for passing around
+ * any data needed by arch specific code for tlb_remove_page.
  */
-static inline struct mmu_gather *
-tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
-{
-        struct mmu_gather *tlb = &get_cpu_var(mmu_gathers);
-
-        tlb->mm = mm;
+struct mmu_gather {
+        struct mm_struct        *mm;
+#ifdef CONFIG_HAVE_RCU_TABLE_FREE
+        struct mmu_table_batch  *batch;
+#endif
+        unsigned int            need_flush : 1, /* Did free PTEs */
+                                fast_mode  : 1; /* No batching   */
 
-        /* Use fast mode if only one CPU is online */
-        tlb->nr = num_online_cpus() > 1 ? 0U : ~0U;
+        unsigned int            fullmm;
 
-        tlb->fullmm = full_mm_flush;
+        struct mmu_gather_batch *active;
+        struct mmu_gather_batch local;
+        struct page             *__pages[MMU_GATHER_BUNDLE];
+};
 
-        return tlb;
-}
+#define HAVE_GENERIC_MMU_GATHER
 
-static inline void
-tlb_flush_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
+static inline int tlb_fast_mode(struct mmu_gather *tlb)
 {
-        if (!tlb->need_flush)
-                return;
-        tlb->need_flush = 0;
-        tlb_flush(tlb);
-        if (!tlb_fast_mode(tlb)) {
-                free_pages_and_swap_cache(tlb->pages, tlb->nr);
-                tlb->nr = 0;
-        }
+#ifdef CONFIG_SMP
+        return tlb->fast_mode;
+#else
+        /*
+         * For UP we don't need to worry about TLB flush
+         * and page free order so much..
+         */
+        return 1;
+#endif
 }
 
-/* tlb_finish_mmu
- *      Called at the end of the shootdown operation to free up any resources
- *      that were required.
- */
-static inline void
-tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
-{
-        tlb_flush_mmu(tlb, start, end);
-
-        /* keep the page table cache within bounds */
-        check_pgt_cache();
-
-        put_cpu_var(mmu_gathers);
-}
+void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, bool fullmm);
+void tlb_flush_mmu(struct mmu_gather *tlb);
+void tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end);
+int __tlb_remove_page(struct mmu_gather *tlb, struct page *page);
 
 /* tlb_remove_page
- *      Must perform the equivalent to __free_pte(pte_get_and_clear(ptep)), while
- *      handling the additional races in SMP caused by other CPUs caching valid
- *      mappings in their TLBs.
+ *      Similar to __tlb_remove_page but will call tlb_flush_mmu() itself when
+ *      required.
  */
 static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
 {
-        tlb->need_flush = 1;
-        if (tlb_fast_mode(tlb)) {
-                free_page_and_swap_cache(page);
-                return;
-        }
-        tlb->pages[tlb->nr++] = page;
-        if (tlb->nr >= FREE_PTE_NR)
-                tlb_flush_mmu(tlb, 0, 0);
+        if (!__tlb_remove_page(tlb, page))
+                tlb_flush_mmu(tlb);
 }
 
 /**
diff --git a/include/asm-generic/unistd.h b/include/asm-generic/unistd.h
index 07c40d5149d..33d52470488 100644
--- a/include/asm-generic/unistd.h
+++ b/include/asm-generic/unistd.h
@@ -24,16 +24,24 @@
 #define __SC_3264(_nr, _32, _64) __SYSCALL(_nr, _64)
 #endif
 
+#ifdef __SYSCALL_COMPAT
+#define __SC_COMP(_nr, _sys, _comp) __SYSCALL(_nr, _comp)
+#define __SC_COMP_3264(_nr, _32, _64, _comp) __SYSCALL(_nr, _comp)
+#else
+#define __SC_COMP(_nr, _sys, _comp) __SYSCALL(_nr, _sys)
+#define __SC_COMP_3264(_nr, _32, _64, _comp) __SC_3264(_nr, _32, _64)
+#endif
+
 #define __NR_io_setup 0
-__SYSCALL(__NR_io_setup, sys_io_setup)
+__SC_COMP(__NR_io_setup, sys_io_setup, compat_sys_io_setup)
 #define __NR_io_destroy 1
 __SYSCALL(__NR_io_destroy, sys_io_destroy)
 #define __NR_io_submit 2
-__SYSCALL(__NR_io_submit, sys_io_submit)
+__SC_COMP(__NR_io_submit, sys_io_submit, compat_sys_io_submit)
 #define __NR_io_cancel 3
 __SYSCALL(__NR_io_cancel, sys_io_cancel)
 #define __NR_io_getevents 4
-__SYSCALL(__NR_io_getevents, sys_io_getevents)
+__SC_COMP(__NR_io_getevents, sys_io_getevents, compat_sys_io_getevents)
 
 /* fs/xattr.c */
 #define __NR_setxattr 5
@@ -67,7 +75,7 @@ __SYSCALL(__NR_getcwd, sys_getcwd)
 
 /* fs/cookies.c */
 #define __NR_lookup_dcookie 18
-__SYSCALL(__NR_lookup_dcookie, sys_lookup_dcookie)
+__SC_COMP(__NR_lookup_dcookie, sys_lookup_dcookie, compat_sys_lookup_dcookie)
 
 /* fs/eventfd.c */
 #define __NR_eventfd2 19
@@ -79,7 +87,7 @@ __SYSCALL(__NR_epoll_create1, sys_epoll_create1)
 #define __NR_epoll_ctl 21
 __SYSCALL(__NR_epoll_ctl, sys_epoll_ctl)
 #define __NR_epoll_pwait 22
-__SYSCALL(__NR_epoll_pwait, sys_epoll_pwait)
+__SC_COMP(__NR_epoll_pwait, sys_epoll_pwait, compat_sys_epoll_pwait)
 
 /* fs/fcntl.c */
 #define __NR_dup 23
@@ -87,7 +95,7 @@ __SYSCALL(__NR_dup, sys_dup)
 #define __NR_dup3 24
 __SYSCALL(__NR_dup3, sys_dup3)
 #define __NR3264_fcntl 25
-__SC_3264(__NR3264_fcntl, sys_fcntl64, sys_fcntl)
+__SC_COMP_3264(__NR3264_fcntl, sys_fcntl64, sys_fcntl, compat_sys_fcntl64)
 
 /* fs/inotify_user.c */
 #define __NR_inotify_init1 26
@@ -99,7 +107,7 @@ __SYSCALL(__NR_inotify_rm_watch, sys_inotify_rm_watch)
 
 /* fs/ioctl.c */
 #define __NR_ioctl 29
-__SYSCALL(__NR_ioctl, sys_ioctl)
+__SC_COMP(__NR_ioctl, sys_ioctl, compat_sys_ioctl)
 
 /* fs/ioprio.c */
 #define __NR_ioprio_set 30
@@ -129,26 +137,30 @@ __SYSCALL(__NR_renameat, sys_renameat)
 #define __NR_umount2 39
 __SYSCALL(__NR_umount2, sys_umount)
 #define __NR_mount 40
-__SYSCALL(__NR_mount, sys_mount)
+__SC_COMP(__NR_mount, sys_mount, compat_sys_mount)
 #define __NR_pivot_root 41
 __SYSCALL(__NR_pivot_root, sys_pivot_root)
 
 /* fs/nfsctl.c */
 #define __NR_nfsservctl 42
-__SYSCALL(__NR_nfsservctl, sys_nfsservctl)
+__SC_COMP(__NR_nfsservctl, sys_nfsservctl, compat_sys_nfsservctl)
 
 /* fs/open.c */
 #define __NR3264_statfs 43
-__SC_3264(__NR3264_statfs, sys_statfs64, sys_statfs)
+__SC_COMP_3264(__NR3264_statfs, sys_statfs64, sys_statfs, \
+               compat_sys_statfs64)
 #define __NR3264_fstatfs 44
-__SC_3264(__NR3264_fstatfs, sys_fstatfs64, sys_fstatfs)
+__SC_COMP_3264(__NR3264_fstatfs, sys_fstatfs64, sys_fstatfs, \
+               compat_sys_fstatfs64)
 #define __NR3264_truncate 45
-__SC_3264(__NR3264_truncate, sys_truncate64, sys_truncate)
+__SC_COMP_3264(__NR3264_truncate, sys_truncate64, sys_truncate, \
+               compat_sys_truncate64)
 #define __NR3264_ftruncate 46
-__SC_3264(__NR3264_ftruncate, sys_ftruncate64, sys_ftruncate)
+__SC_COMP_3264(__NR3264_ftruncate, sys_ftruncate64, sys_ftruncate, \
+               compat_sys_ftruncate64)
 
 #define __NR_fallocate 47
-__SYSCALL(__NR_fallocate, sys_fallocate)
+__SC_COMP(__NR_fallocate, sys_fallocate, compat_sys_fallocate)
 #define __NR_faccessat 48
 __SYSCALL(__NR_faccessat, sys_faccessat)
 #define __NR_chdir 49
@@ -166,7 +178,7 @@ __SYSCALL(__NR_fchownat, sys_fchownat)
 #define __NR_fchown 55
 __SYSCALL(__NR_fchown, sys_fchown)
 #define __NR_openat 56
-__SYSCALL(__NR_openat, sys_openat)
+__SC_COMP(__NR_openat, sys_openat, compat_sys_openat)
 #define __NR_close 57
 __SYSCALL(__NR_close, sys_close)
 #define __NR_vhangup 58
@@ -182,7 +194,7 @@ __SYSCALL(__NR_quotactl, sys_quotactl)
 
 /* fs/readdir.c */
 #define __NR_getdents64 61
-__SYSCALL(__NR_getdents64, sys_getdents64)
+__SC_COMP(__NR_getdents64, sys_getdents64, compat_sys_getdents64)
 
 /* fs/read_write.c */
 #define __NR3264_lseek 62
@@ -192,17 +204,17 @@ __SYSCALL(__NR_read, sys_read)
 #define __NR_write 64
 __SYSCALL(__NR_write, sys_write)
 #define __NR_readv 65
-__SYSCALL(__NR_readv, sys_readv)
+__SC_COMP(__NR_readv, sys_readv, compat_sys_readv)
 #define __NR_writev 66
-__SYSCALL(__NR_writev, sys_writev)
+__SC_COMP(__NR_writev, sys_writev, compat_sys_writev)
 #define __NR_pread64 67
-__SYSCALL(__NR_pread64, sys_pread64)
+__SC_COMP(__NR_pread64, sys_pread64, compat_sys_pread64)
 #define __NR_pwrite64 68
-__SYSCALL(__NR_pwrite64, sys_pwrite64)
+__SC_COMP(__NR_pwrite64, sys_pwrite64, compat_sys_pwrite64)
 #define __NR_preadv 69
-__SYSCALL(__NR_preadv, sys_preadv)
+__SC_COMP(__NR_preadv, sys_preadv, compat_sys_preadv)
 #define __NR_pwritev 70
-__SYSCALL(__NR_pwritev, sys_pwritev)
+__SC_COMP(__NR_pwritev, sys_pwritev, compat_sys_pwritev)
 
 /* fs/sendfile.c */
 #define __NR3264_sendfile 71
@@ -210,17 +222,17 @@ __SC_3264(__NR3264_sendfile, sys_sendfile64, sys_sendfile)
 
 /* fs/select.c */
 #define __NR_pselect6 72
-__SYSCALL(__NR_pselect6, sys_pselect6)
+__SC_COMP(__NR_pselect6, sys_pselect6, compat_sys_pselect6)
 #define __NR_ppoll 73
-__SYSCALL(__NR_ppoll, sys_ppoll)
+__SC_COMP(__NR_ppoll, sys_ppoll, compat_sys_ppoll)
 
 /* fs/signalfd.c */
 #define __NR_signalfd4 74
-__SYSCALL(__NR_signalfd4, sys_signalfd4)
+__SC_COMP(__NR_signalfd4, sys_signalfd4, compat_sys_signalfd4)
 
 /* fs/splice.c */
 #define __NR_vmsplice 75
-__SYSCALL(__NR_vmsplice, sys_vmsplice)
+__SC_COMP(__NR_vmsplice, sys_vmsplice, compat_sys_vmsplice)
 #define __NR_splice 76
 __SYSCALL(__NR_splice, sys_splice)
 #define __NR_tee 77
@@ -243,23 +255,27 @@ __SYSCALL(__NR_fsync, sys_fsync)
 __SYSCALL(__NR_fdatasync, sys_fdatasync)
 #ifdef __ARCH_WANT_SYNC_FILE_RANGE2
 #define __NR_sync_file_range2 84
-__SYSCALL(__NR_sync_file_range2, sys_sync_file_range2)
+__SC_COMP(__NR_sync_file_range2, sys_sync_file_range2, \
+          compat_sys_sync_file_range2)
 #else
 #define __NR_sync_file_range 84
-__SYSCALL(__NR_sync_file_range, sys_sync_file_range)
+__SC_COMP(__NR_sync_file_range, sys_sync_file_range, \
+          compat_sys_sync_file_range)
 #endif
 
 /* fs/timerfd.c */
 #define __NR_timerfd_create 85
 __SYSCALL(__NR_timerfd_create, sys_timerfd_create)
 #define __NR_timerfd_settime 86
-__SYSCALL(__NR_timerfd_settime, sys_timerfd_settime)
+__SC_COMP(__NR_timerfd_settime, sys_timerfd_settime, \
+          compat_sys_timerfd_settime)
 #define __NR_timerfd_gettime 87
-__SYSCALL(__NR_timerfd_gettime, sys_timerfd_gettime)
+__SC_COMP(__NR_timerfd_gettime, sys_timerfd_gettime, \
+          compat_sys_timerfd_gettime)
 
 /* fs/utimes.c */
 #define __NR_utimensat 88
-__SYSCALL(__NR_utimensat, sys_utimensat)
+__SC_COMP(__NR_utimensat, sys_utimensat, compat_sys_utimensat)
 
 /* kernel/acct.c */
 #define __NR_acct 89
@@ -281,7 +297,7 @@ __SYSCALL(__NR_exit, sys_exit)
 #define __NR_exit_group 94
 __SYSCALL(__NR_exit_group, sys_exit_group)
 #define __NR_waitid 95
-__SYSCALL(__NR_waitid, sys_waitid)
+__SC_COMP(__NR_waitid, sys_waitid, compat_sys_waitid)
 
 /* kernel/fork.c */
 #define __NR_set_tid_address 96
@@ -291,25 +307,27 @@ __SYSCALL(__NR_unshare, sys_unshare)
 
 /* kernel/futex.c */
 #define __NR_futex 98
-__SYSCALL(__NR_futex, sys_futex)
+__SC_COMP(__NR_futex, sys_futex, compat_sys_futex)
 #define __NR_set_robust_list 99
-__SYSCALL(__NR_set_robust_list, sys_set_robust_list)
+__SC_COMP(__NR_set_robust_list, sys_set_robust_list, \
+          compat_sys_set_robust_list)
 #define __NR_get_robust_list 100
-__SYSCALL(__NR_get_robust_list, sys_get_robust_list)
+__SC_COMP(__NR_get_robust_list, sys_get_robust_list, \
+          compat_sys_get_robust_list)
 
 /* kernel/hrtimer.c */
 #define __NR_nanosleep 101
-__SYSCALL(__NR_nanosleep, sys_nanosleep)
+__SC_COMP(__NR_nanosleep, sys_nanosleep, compat_sys_nanosleep)
 
 /* kernel/itimer.c */
 #define __NR_getitimer 102
-__SYSCALL(__NR_getitimer, sys_getitimer)
+__SC_COMP(__NR_getitimer, sys_getitimer, compat_sys_getitimer)
 #define __NR_setitimer 103
-__SYSCALL(__NR_setitimer, sys_setitimer)
+__SC_COMP(__NR_setitimer, sys_setitimer, compat_sys_setitimer)
 
 /* kernel/kexec.c */
 #define __NR_kexec_load 104
-__SYSCALL(__NR_kexec_load, sys_kexec_load)
+__SC_COMP(__NR_kexec_load, sys_kexec_load, compat_sys_kexec_load)
 
 /* kernel/module.c */
 #define __NR_init_module 105
@@ -319,23 +337,24 @@ __SYSCALL(__NR_delete_module, sys_delete_module)
 
 /* kernel/posix-timers.c */
 #define __NR_timer_create 107
-__SYSCALL(__NR_timer_create, sys_timer_create)
+__SC_COMP(__NR_timer_create, sys_timer_create, compat_sys_timer_create)
 #define __NR_timer_gettime 108
-__SYSCALL(__NR_timer_gettime, sys_timer_gettime)
+__SC_COMP(__NR_timer_gettime, sys_timer_gettime, compat_sys_timer_gettime)
 #define __NR_timer_getoverrun 109
 __SYSCALL(__NR_timer_getoverrun, sys_timer_getoverrun)
 #define __NR_timer_settime 110
-__SYSCALL(__NR_timer_settime, sys_timer_settime)
+__SC_COMP(__NR_timer_settime, sys_timer_settime, compat_sys_timer_settime)
 #define __NR_timer_delete 111
 __SYSCALL(__NR_timer_delete, sys_timer_delete)
 #define __NR_clock_settime 112
-__SYSCALL(__NR_clock_settime, sys_clock_settime)
+__SC_COMP(__NR_clock_settime, sys_clock_settime, compat_sys_clock_settime)
 #define __NR_clock_gettime 113
-__SYSCALL(__NR_clock_gettime, sys_clock_gettime)
+__SC_COMP(__NR_clock_gettime, sys_clock_gettime, compat_sys_clock_gettime)
 #define __NR_clock_getres 114
-__SYSCALL(__NR_clock_getres, sys_clock_getres)
+__SC_COMP(__NR_clock_getres, sys_clock_getres, compat_sys_clock_getres)
 #define __NR_clock_nanosleep 115
-__SYSCALL(__NR_clock_nanosleep, sys_clock_nanosleep)
+__SC_COMP(__NR_clock_nanosleep, sys_clock_nanosleep, \
+          compat_sys_clock_nanosleep)
 
 /* kernel/printk.c */
 #define __NR_syslog 116
@@ -355,9 +374,11 @@ __SYSCALL(__NR_sched_getscheduler, sys_sched_getscheduler)
 #define __NR_sched_getparam 121
 __SYSCALL(__NR_sched_getparam, sys_sched_getparam)
 #define __NR_sched_setaffinity 122
-__SYSCALL(__NR_sched_setaffinity, sys_sched_setaffinity)
+__SC_COMP(__NR_sched_setaffinity, sys_sched_setaffinity, \
+          compat_sys_sched_setaffinity)
 #define __NR_sched_getaffinity 123
-__SYSCALL(__NR_sched_getaffinity, sys_sched_getaffinity)
+__SC_COMP(__NR_sched_getaffinity, sys_sched_getaffinity, \
+          compat_sys_sched_getaffinity)
 #define __NR_sched_yield 124
 __SYSCALL(__NR_sched_yield, sys_sched_yield)
 #define __NR_sched_get_priority_max 125
@@ -365,7 +386,8 @@ __SYSCALL(__NR_sched_get_priority_max, sys_sched_get_priority_max)
 #define __NR_sched_get_priority_min 126
 __SYSCALL(__NR_sched_get_priority_min, sys_sched_get_priority_min)
 #define __NR_sched_rr_get_interval 127
-__SYSCALL(__NR_sched_rr_get_interval, sys_sched_rr_get_interval)
+__SC_COMP(__NR_sched_rr_get_interval, sys_sched_rr_get_interval, \
+          compat_sys_sched_rr_get_interval)
 
 /* kernel/signal.c */
 #define __NR_restart_syscall 128
@@ -377,21 +399,23 @@ __SYSCALL(__NR_tkill, sys_tkill)
 #define __NR_tgkill 131
 __SYSCALL(__NR_tgkill, sys_tgkill)
 #define __NR_sigaltstack 132
-__SYSCALL(__NR_sigaltstack, sys_sigaltstack)
+__SC_COMP(__NR_sigaltstack, sys_sigaltstack, compat_sys_sigaltstack)
 #define __NR_rt_sigsuspend 133
-__SYSCALL(__NR_rt_sigsuspend, sys_rt_sigsuspend) /* __ARCH_WANT_SYS_RT_SIGSUSPEND */
+__SC_COMP(__NR_rt_sigsuspend, sys_rt_sigsuspend, compat_sys_rt_sigsuspend)
 #define __NR_rt_sigaction 134
-__SYSCALL(__NR_rt_sigaction, sys_rt_sigaction) /* __ARCH_WANT_SYS_RT_SIGACTION */
+__SC_COMP(__NR_rt_sigaction, sys_rt_sigaction, compat_sys_rt_sigaction)
 #define __NR_rt_sigprocmask 135
 __SYSCALL(__NR_rt_sigprocmask, sys_rt_sigprocmask)
 #define __NR_rt_sigpending 136
 __SYSCALL(__NR_rt_sigpending, sys_rt_sigpending)
 #define __NR_rt_sigtimedwait 137
-__SYSCALL(__NR_rt_sigtimedwait, sys_rt_sigtimedwait)
+__SC_COMP(__NR_rt_sigtimedwait, sys_rt_sigtimedwait, \
+          compat_sys_rt_sigtimedwait)
 #define __NR_rt_sigqueueinfo 138
-__SYSCALL(__NR_rt_sigqueueinfo, sys_rt_sigqueueinfo)
+__SC_COMP(__NR_rt_sigqueueinfo, sys_rt_sigqueueinfo, \
+          compat_sys_rt_sigqueueinfo)
 #define __NR_rt_sigreturn 139
-__SYSCALL(__NR_rt_sigreturn, sys_rt_sigreturn) /* sys_rt_sigreturn_wrapper, */
+__SC_COMP(__NR_rt_sigreturn, sys_rt_sigreturn, compat_sys_rt_sigreturn)
 
 /* kernel/sys.c */
 #define __NR_setpriority 140
@@ -421,7 +445,7 @@ __SYSCALL(__NR_setfsuid, sys_setfsuid)
 #define __NR_setfsgid 152
 __SYSCALL(__NR_setfsgid, sys_setfsgid)
 #define __NR_times 153
-__SYSCALL(__NR_times, sys_times)
+__SC_COMP(__NR_times, sys_times, compat_sys_times)
 #define __NR_setpgid 154
 __SYSCALL(__NR_setpgid, sys_setpgid)
 #define __NR_getpgid 155
@@ -441,11 +465,11 @@ __SYSCALL(__NR_sethostname, sys_sethostname)
 #define __NR_setdomainname 162
 __SYSCALL(__NR_setdomainname, sys_setdomainname)
 #define __NR_getrlimit 163
-__SYSCALL(__NR_getrlimit, sys_getrlimit)
+__SC_COMP(__NR_getrlimit, sys_getrlimit, compat_sys_getrlimit)
 #define __NR_setrlimit 164
-__SYSCALL(__NR_setrlimit, sys_setrlimit)
+__SC_COMP(__NR_setrlimit, sys_setrlimit, compat_sys_setrlimit)
 #define __NR_getrusage 165
-__SYSCALL(__NR_getrusage, sys_getrusage)
+__SC_COMP(__NR_getrusage, sys_getrusage, compat_sys_getrusage)
 #define __NR_umask 166
 __SYSCALL(__NR_umask, sys_umask)
 #define __NR_prctl 167
@@ -455,11 +479,11 @@ __SYSCALL(__NR_getcpu, sys_getcpu)
 
 /* kernel/time.c */
 #define __NR_gettimeofday 169
-__SYSCALL(__NR_gettimeofday, sys_gettimeofday)
+__SC_COMP(__NR_gettimeofday, sys_gettimeofday, compat_sys_gettimeofday)
 #define __NR_settimeofday 170
-__SYSCALL(__NR_settimeofday, sys_settimeofday)
+__SC_COMP(__NR_settimeofday, sys_settimeofday, compat_sys_settimeofday)
 #define __NR_adjtimex 171
-__SYSCALL(__NR_adjtimex, sys_adjtimex)
+__SC_COMP(__NR_adjtimex, sys_adjtimex, compat_sys_adjtimex)
 
 /* kernel/timer.c */
 #define __NR_getpid 172
@@ -477,39 +501,40 @@ __SYSCALL(__NR_getegid, sys_getegid)
 #define __NR_gettid 178
 __SYSCALL(__NR_gettid, sys_gettid)
 #define __NR_sysinfo 179
-__SYSCALL(__NR_sysinfo, sys_sysinfo)
+__SC_COMP(__NR_sysinfo, sys_sysinfo, compat_sys_sysinfo)
 
 /* ipc/mqueue.c */
 #define __NR_mq_open 180
-__SYSCALL(__NR_mq_open, sys_mq_open)
+__SC_COMP(__NR_mq_open, sys_mq_open, compat_sys_mq_open)
 #define __NR_mq_unlink 181
 __SYSCALL(__NR_mq_unlink, sys_mq_unlink)
 #define __NR_mq_timedsend 182
-__SYSCALL(__NR_mq_timedsend, sys_mq_timedsend)
+__SC_COMP(__NR_mq_timedsend, sys_mq_timedsend, compat_sys_mq_timedsend)
 #define __NR_mq_timedreceive 183
-__SYSCALL(__NR_mq_timedreceive, sys_mq_timedreceive)
+__SC_COMP(__NR_mq_timedreceive, sys_mq_timedreceive, \
+          compat_sys_mq_timedreceive)
 #define __NR_mq_notify 184
-__SYSCALL(__NR_mq_notify, sys_mq_notify)
+__SC_COMP(__NR_mq_notify, sys_mq_notify, compat_sys_mq_notify)
 #define __NR_mq_getsetattr 185
-__SYSCALL(__NR_mq_getsetattr, sys_mq_getsetattr)
+__SC_COMP(__NR_mq_getsetattr, sys_mq_getsetattr, compat_sys_mq_getsetattr)
 
 /* ipc/msg.c */
 #define __NR_msgget 186
 __SYSCALL(__NR_msgget, sys_msgget)
 #define __NR_msgctl 187
-__SYSCALL(__NR_msgctl, sys_msgctl)
+__SC_COMP(__NR_msgctl, sys_msgctl, compat_sys_msgctl)
 #define __NR_msgrcv 188
-__SYSCALL(__NR_msgrcv, sys_msgrcv)
+__SC_COMP(__NR_msgrcv, sys_msgrcv, compat_sys_msgrcv)
 #define __NR_msgsnd 189
-__SYSCALL(__NR_msgsnd, sys_msgsnd)
+__SC_COMP(__NR_msgsnd, sys_msgsnd, compat_sys_msgsnd)
 
 /* ipc/sem.c */
 #define __NR_semget 190
 __SYSCALL(__NR_semget, sys_semget)
 #define __NR_semctl 191
-__SYSCALL(__NR_semctl, sys_semctl)
+__SC_COMP(__NR_semctl, sys_semctl, compat_sys_semctl)
 #define __NR_semtimedop 192
-__SYSCALL(__NR_semtimedop, sys_semtimedop)
+__SC_COMP(__NR_semtimedop, sys_semtimedop, compat_sys_semtimedop)
 #define __NR_semop 193
 __SYSCALL(__NR_semop, sys_semop)
 
@@ -517,9 +542,9 @@ __SYSCALL(__NR_semop, sys_semop)
 #define __NR_shmget 194
 __SYSCALL(__NR_shmget, sys_shmget)
 #define __NR_shmctl 195
-__SYSCALL(__NR_shmctl, sys_shmctl)
+__SC_COMP(__NR_shmctl, sys_shmctl, compat_sys_shmctl)
 #define __NR_shmat 196
-__SYSCALL(__NR_shmat, sys_shmat)
+__SC_COMP(__NR_shmat, sys_shmat, compat_sys_shmat)
 #define __NR_shmdt 197
 __SYSCALL(__NR_shmdt, sys_shmdt)
 
@@ -543,21 +568,21 @@ __SYSCALL(__NR_getpeername, sys_getpeername)
 #define __NR_sendto 206
 __SYSCALL(__NR_sendto, sys_sendto)
 #define __NR_recvfrom 207
-__SYSCALL(__NR_recvfrom, sys_recvfrom)
+__SC_COMP(__NR_recvfrom, sys_recvfrom, compat_sys_recvfrom)
 #define __NR_setsockopt 208
-__SYSCALL(__NR_setsockopt, sys_setsockopt)
+__SC_COMP(__NR_setsockopt, sys_setsockopt, compat_sys_setsockopt)
 #define __NR_getsockopt 209
-__SYSCALL(__NR_getsockopt, sys_getsockopt)
+__SC_COMP(__NR_getsockopt, sys_getsockopt, compat_sys_getsockopt)
 #define __NR_shutdown 210
 __SYSCALL(__NR_shutdown, sys_shutdown)
 #define __NR_sendmsg 211
-__SYSCALL(__NR_sendmsg, sys_sendmsg)
+__SC_COMP(__NR_sendmsg, sys_sendmsg, compat_sys_sendmsg)
 #define __NR_recvmsg 212
-__SYSCALL(__NR_recvmsg, sys_recvmsg)
+__SC_COMP(__NR_recvmsg, sys_recvmsg, compat_sys_recvmsg)
 
 /* mm/filemap.c */
 #define __NR_readahead 213
-__SYSCALL(__NR_readahead, sys_readahead)
+__SC_COMP(__NR_readahead, sys_readahead, compat_sys_readahead)
 
 /* mm/nommu.c, also with MMU */
 #define __NR_brk 214
@@ -573,19 +598,19 @@ __SYSCALL(__NR_add_key, sys_add_key)
 #define __NR_request_key 218
 __SYSCALL(__NR_request_key, sys_request_key)
 #define __NR_keyctl 219
-__SYSCALL(__NR_keyctl, sys_keyctl)
+__SC_COMP(__NR_keyctl, sys_keyctl, compat_sys_keyctl)
 
 /* arch/example/kernel/sys_example.c */
 #define __NR_clone 220
-__SYSCALL(__NR_clone, sys_clone)        /* .long sys_clone_wrapper */
+__SYSCALL(__NR_clone, sys_clone)
 #define __NR_execve 221
-__SYSCALL(__NR_execve, sys_execve)      /* .long sys_execve_wrapper */
+__SC_COMP(__NR_execve, sys_execve, compat_sys_execve)
 
 #define __NR3264_mmap 222
 __SC_3264(__NR3264_mmap, sys_mmap2, sys_mmap)
 /* mm/fadvise.c */
 #define __NR3264_fadvise64 223
-__SYSCALL(__NR3264_fadvise64, sys_fadvise64_64)
+__SC_COMP(__NR3264_fadvise64, sys_fadvise64_64, compat_sys_fadvise64_64)
 
 /* mm/, CONFIG_MMU only */
 #ifndef __ARCH_NOMMU
@@ -612,25 +637,26 @@ __SYSCALL(__NR_madvise, sys_madvise)
 #define __NR_remap_file_pages 234
 __SYSCALL(__NR_remap_file_pages, sys_remap_file_pages)
 #define __NR_mbind 235
-__SYSCALL(__NR_mbind, sys_mbind)
+__SC_COMP(__NR_mbind, sys_mbind, compat_sys_mbind)
 #define __NR_get_mempolicy 236
-__SYSCALL(__NR_get_mempolicy, sys_get_mempolicy)
+__SC_COMP(__NR_get_mempolicy, sys_get_mempolicy, compat_sys_get_mempolicy)
 #define __NR_set_mempolicy 237
-__SYSCALL(__NR_set_mempolicy, sys_set_mempolicy)
+__SC_COMP(__NR_set_mempolicy, sys_set_mempolicy, compat_sys_set_mempolicy)
 #define __NR_migrate_pages 238
-__SYSCALL(__NR_migrate_pages, sys_migrate_pages)
+__SC_COMP(__NR_migrate_pages, sys_migrate_pages, compat_sys_migrate_pages)
 #define __NR_move_pages 239
-__SYSCALL(__NR_move_pages, sys_move_pages)
+__SC_COMP(__NR_move_pages, sys_move_pages, compat_sys_move_pages)
 #endif
 
 #define __NR_rt_tgsigqueueinfo 240
-__SYSCALL(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo)
+__SC_COMP(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo, \
+          compat_sys_rt_tgsigqueueinfo)
 #define __NR_perf_event_open 241
 __SYSCALL(__NR_perf_event_open, sys_perf_event_open)
 #define __NR_accept4 242
 __SYSCALL(__NR_accept4, sys_accept4)
 #define __NR_recvmmsg 243
-__SYSCALL(__NR_recvmmsg, sys_recvmmsg)
+__SC_COMP(__NR_recvmmsg, sys_recvmmsg, compat_sys_recvmmsg)
 
 /*
  * Architectures may provide up to 16 syscalls of their own
@@ -639,19 +665,20 @@ __SYSCALL(__NR_recvmmsg, sys_recvmmsg)
 #define __NR_arch_specific_syscall 244
 
 #define __NR_wait4 260
-__SYSCALL(__NR_wait4, sys_wait4)
+__SC_COMP(__NR_wait4, sys_wait4, compat_sys_wait4)
 #define __NR_prlimit64 261
 __SYSCALL(__NR_prlimit64, sys_prlimit64)
 #define __NR_fanotify_init 262
 __SYSCALL(__NR_fanotify_init, sys_fanotify_init)
 #define __NR_fanotify_mark 263
 __SYSCALL(__NR_fanotify_mark, sys_fanotify_mark)
-#define __NR_name_to_handle_at          264
+#define __NR_name_to_handle_at         264
 __SYSCALL(__NR_name_to_handle_at, sys_name_to_handle_at)
-#define __NR_open_by_handle_at          265
-__SYSCALL(__NR_open_by_handle_at, sys_open_by_handle_at)
+#define __NR_open_by_handle_at         265
+__SC_COMP(__NR_open_by_handle_at, sys_open_by_handle_at, \
+          compat_sys_open_by_handle_at)
 #define __NR_clock_adjtime 266
-__SYSCALL(__NR_clock_adjtime, sys_clock_adjtime)
+__SC_COMP(__NR_clock_adjtime, sys_clock_adjtime, compat_sys_clock_adjtime)
 #define __NR_syncfs 267
 __SYSCALL(__NR_syncfs, sys_syncfs)