5 files changed, 86 insertions, 162 deletions

diff --git a/include/asm-generic/unistd.h b/include/asm-generic/unistd.h
index 4077b5d9ff81..0501fa3f783d 100644
--- a/include/asm-generic/unistd.h
+++ b/include/asm-generic/unistd.h
@@ -9,20 +9,3 @@
 #define __ARCH_WANT_STAT64
 #define __ARCH_WANT_SYS_LLSEEK
 #endif
-
-/*
- * "Conditional" syscalls
- *
- * What we want is __attribute__((weak,alias("sys_ni_syscall"))),
- * but it doesn't work on all toolchains, so we just do it by hand
- */
-#ifndef cond_syscall
-#ifdef CONFIG_SYMBOL_PREFIX
-#define __SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX
-#else
-#define __SYMBOL_PREFIX
-#endif
-#define cond_syscall(x) asm(".weak\t" __SYMBOL_PREFIX #x "\n\t" \
-                            ".set\t" __SYMBOL_PREFIX #x "," \
-                            __SYMBOL_PREFIX "sys_ni_syscall")
-#endif
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 377cd8c3395e..d53c35352ea9 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -27,12 +27,6 @@
 #define __SC_DELOUSE(t,v) ((t)(unsigned long)(v))
 #endif
 
-#define __SC_CCAST1(t1, a1)      __SC_DELOUSE(t1,a1)
-#define __SC_CCAST2(t2, a2, ...) __SC_DELOUSE(t2,a2), __SC_CCAST1(__VA_ARGS__)
-#define __SC_CCAST3(t3, a3, ...) __SC_DELOUSE(t3,a3), __SC_CCAST2(__VA_ARGS__)
-#define __SC_CCAST4(t4, a4, ...) __SC_DELOUSE(t4,a4), __SC_CCAST3(__VA_ARGS__)
-#define __SC_CCAST5(t5, a5, ...) __SC_DELOUSE(t5,a5), __SC_CCAST4(__VA_ARGS__)
-#define __SC_CCAST6(t6, a6, ...) __SC_DELOUSE(t6,a6), __SC_CCAST5(__VA_ARGS__)
 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
         COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
@@ -46,24 +40,15 @@
 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
         COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
 
-#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
-
 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                            \
-        asmlinkage long compat_sys##name(__SC_DECL##x(__VA_ARGS__));    \
-        static inline long C_SYSC##name(__SC_DECL##x(__VA_ARGS__));     \
-        asmlinkage long compat_SyS##name(__SC_LONG##x(__VA_ARGS__))     \
+        asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
+        static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
+        asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
         {                                                               \
-                return (long) C_SYSC##name(__SC_CCAST##x(__VA_ARGS__)); \
+                return C_SYSC##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
         }                                                               \
         SYSCALL_ALIAS(compat_sys##name, compat_SyS##name);              \
-        static inline long C_SYSC##name(__SC_DECL##x(__VA_ARGS__))
-
-#else /* CONFIG_HAVE_SYSCALL_WRAPPERS */
-
-#define COMPAT_SYSCALL_DEFINEx(x, name, ...)                            \
-        asmlinkage long compat_sys##name(__SC_DECL##x(__VA_ARGS__))
-
-#endif /* CONFIG_HAVE_SYSCALL_WRAPPERS */
+        static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
 
 #ifndef compat_user_stack_pointer
 #define compat_user_stack_pointer() current_user_stack_pointer()
@@ -326,21 +311,13 @@ 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_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,
+asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
+asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
+asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
+asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
                 compat_ssize_t msgsz, int msgflg);
-long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
+asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
                 compat_ssize_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,
@@ -444,13 +421,13 @@ extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
                                   compat_long_t addr, compat_long_t data);
 
+asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, size_t);
 /*
  * epoll (fs/eventpoll.c) compat bits follow ...
  */
-struct epoll_event;
-#define compat_epoll_event      epoll_event
+struct epoll_event;     /* fortunately, this one is fixed-layout */
 asmlinkage long compat_sys_epoll_pwait(int epfd,
-                        struct compat_epoll_event __user *events,
+                        struct epoll_event __user *events,
                         int maxevents, int timeout,
                         const compat_sigset_t __user *sigmask,
                         compat_size_t sigsetsize);
@@ -685,6 +662,8 @@ asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
 
 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
                                     compat_off_t __user *offset, compat_size_t count);
+asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
+                                    compat_loff_t __user *offset, compat_size_t count);
 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
                                        compat_stack_t __user *uoss_ptr);
 
diff --git a/include/linux/linkage.h b/include/linux/linkage.h
index 807f1e533226..829d66c67fc2 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -2,6 +2,7 @@
 #define _LINUX_LINKAGE_H
 
 #include <linux/compiler.h>
+#include <linux/stringify.h>
 #include <asm/linkage.h>
 
 #ifdef __cplusplus
@@ -14,6 +15,26 @@
 #define asmlinkage CPP_ASMLINKAGE
 #endif
 
+#ifndef SYMBOL_NAME
+#ifdef CONFIG_SYMBOL_PREFIX
+#define SYMBOL_NAME(x) CONFIG_SYMBOL_PREFIX ## x
+#else
+#define SYMBOL_NAME(x) x
+#endif
+#endif
+#define __SYMBOL_NAME(x) __stringify(SYMBOL_NAME(x))
+
+#ifndef cond_syscall
+#define cond_syscall(x) asm(".weak\t" __SYMBOL_NAME(x) \
+        "\n\t.set\t" __SYMBOL_NAME(x) "," __SYMBOL_NAME(sys_ni_syscall));
+#endif
+
+#ifndef SYSCALL_ALIAS
+#define SYSCALL_ALIAS(alias, name)                              \
+        asm ("\t.globl " __SYMBOL_NAME(alias)                   \
+        "\n\t.set\t" __SYMBOL_NAME(alias) "," __SYMBOL_NAME(name))
+#endif
+
 #define __page_aligned_data     __section(.data..page_aligned) __aligned(PAGE_SIZE)
 #define __page_aligned_bss      __section(.bss..page_aligned) __aligned(PAGE_SIZE)
 
diff --git a/include/linux/mm.h b/include/linux/mm.h
index c05d7cfbb6b9..1a7f19e7f1a0 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1082,9 +1082,6 @@ extern unsigned long move_page_tables(struct vm_area_struct *vma,
                 unsigned long old_addr, struct vm_area_struct *new_vma,
                 unsigned long new_addr, unsigned long len,
                 bool need_rmap_locks);
-extern unsigned long do_mremap(unsigned long addr,
-                               unsigned long old_len, unsigned long new_len,
-                               unsigned long flags, unsigned long new_addr);
 extern unsigned long change_protection(struct vm_area_struct *vma, unsigned long start,
                               unsigned long end, pgprot_t newprot,
                               int dirty_accountable, int prot_numa);
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 313a8e0a6553..4147d700a293 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -78,49 +78,34 @@ struct sigaltstack;
 #include <linux/key.h>
 #include <trace/syscall.h>
 
-#define __SC_DECL1(t1, a1)      t1 a1
-#define __SC_DECL2(t2, a2, ...) t2 a2, __SC_DECL1(__VA_ARGS__)
-#define __SC_DECL3(t3, a3, ...) t3 a3, __SC_DECL2(__VA_ARGS__)
-#define __SC_DECL4(t4, a4, ...) t4 a4, __SC_DECL3(__VA_ARGS__)
-#define __SC_DECL5(t5, a5, ...) t5 a5, __SC_DECL4(__VA_ARGS__)
-#define __SC_DECL6(t6, a6, ...) t6 a6, __SC_DECL5(__VA_ARGS__)
-
-#define __SC_LONG1(t1, a1)      long a1
-#define __SC_LONG2(t2, a2, ...) long a2, __SC_LONG1(__VA_ARGS__)
-#define __SC_LONG3(t3, a3, ...) long a3, __SC_LONG2(__VA_ARGS__)
-#define __SC_LONG4(t4, a4, ...) long a4, __SC_LONG3(__VA_ARGS__)
-#define __SC_LONG5(t5, a5, ...) long a5, __SC_LONG4(__VA_ARGS__)
-#define __SC_LONG6(t6, a6, ...) long a6, __SC_LONG5(__VA_ARGS__)
-
-#define __SC_CAST1(t1, a1)      (t1) a1
-#define __SC_CAST2(t2, a2, ...) (t2) a2, __SC_CAST1(__VA_ARGS__)
-#define __SC_CAST3(t3, a3, ...) (t3) a3, __SC_CAST2(__VA_ARGS__)
-#define __SC_CAST4(t4, a4, ...) (t4) a4, __SC_CAST3(__VA_ARGS__)
-#define __SC_CAST5(t5, a5, ...) (t5) a5, __SC_CAST4(__VA_ARGS__)
-#define __SC_CAST6(t6, a6, ...) (t6) a6, __SC_CAST5(__VA_ARGS__)
-
-#define __SC_TEST(type)         BUILD_BUG_ON(sizeof(type) > sizeof(long))
-#define __SC_TEST1(t1, a1)      __SC_TEST(t1)
-#define __SC_TEST2(t2, a2, ...) __SC_TEST(t2); __SC_TEST1(__VA_ARGS__)
-#define __SC_TEST3(t3, a3, ...) __SC_TEST(t3); __SC_TEST2(__VA_ARGS__)
-#define __SC_TEST4(t4, a4, ...) __SC_TEST(t4); __SC_TEST3(__VA_ARGS__)
-#define __SC_TEST5(t5, a5, ...) __SC_TEST(t5); __SC_TEST4(__VA_ARGS__)
-#define __SC_TEST6(t6, a6, ...) __SC_TEST(t6); __SC_TEST5(__VA_ARGS__)
+/*
+ * __MAP - apply a macro to syscall arguments
+ * __MAP(n, m, t1, a1, t2, a2, ..., tn, an) will expand to
+ *    m(t1, a1), m(t2, a2), ..., m(tn, an)
+ * The first argument must be equal to the amount of type/name
+ * pairs given.  Note that this list of pairs (i.e. the arguments
+ * of __MAP starting at the third one) is in the same format as
+ * for SYSCALL_DEFINE<n>/COMPAT_SYSCALL_DEFINE<n>
+ */
+#define __MAP0(m,...)
+#define __MAP1(m,t,a) m(t,a)
+#define __MAP2(m,t,a,...) m(t,a), __MAP1(m,__VA_ARGS__)
+#define __MAP3(m,t,a,...) m(t,a), __MAP2(m,__VA_ARGS__)
+#define __MAP4(m,t,a,...) m(t,a), __MAP3(m,__VA_ARGS__)
+#define __MAP5(m,t,a,...) m(t,a), __MAP4(m,__VA_ARGS__)
+#define __MAP6(m,t,a,...) m(t,a), __MAP5(m,__VA_ARGS__)
+#define __MAP(n,...) __MAP##n(__VA_ARGS__)
+
+#define __SC_DECL(t, a) t a
+#define __TYPE_IS_LL(t) (__same_type((t)0, 0LL) || __same_type((t)0, 0ULL))
+#define __SC_LONG(t, a) __typeof(__builtin_choose_expr(__TYPE_IS_LL(t), 0LL, 0L)) a
+#define __SC_CAST(t, a) (t) a
+#define __SC_ARGS(t, a) a
+#define __SC_TEST(t, a) (void)BUILD_BUG_ON_ZERO(!__TYPE_IS_LL(t) && sizeof(t) > sizeof(long))
 
 #ifdef CONFIG_FTRACE_SYSCALLS
-#define __SC_STR_ADECL1(t, a)           #a
-#define __SC_STR_ADECL2(t, a, ...)      #a, __SC_STR_ADECL1(__VA_ARGS__)
-#define __SC_STR_ADECL3(t, a, ...)      #a, __SC_STR_ADECL2(__VA_ARGS__)
-#define __SC_STR_ADECL4(t, a, ...)      #a, __SC_STR_ADECL3(__VA_ARGS__)
-#define __SC_STR_ADECL5(t, a, ...)      #a, __SC_STR_ADECL4(__VA_ARGS__)
-#define __SC_STR_ADECL6(t, a, ...)      #a, __SC_STR_ADECL5(__VA_ARGS__)
-
-#define __SC_STR_TDECL1(t, a)           #t
-#define __SC_STR_TDECL2(t, a, ...)      #t, __SC_STR_TDECL1(__VA_ARGS__)
-#define __SC_STR_TDECL3(t, a, ...)      #t, __SC_STR_TDECL2(__VA_ARGS__)
-#define __SC_STR_TDECL4(t, a, ...)      #t, __SC_STR_TDECL3(__VA_ARGS__)
-#define __SC_STR_TDECL5(t, a, ...)      #t, __SC_STR_TDECL4(__VA_ARGS__)
-#define __SC_STR_TDECL6(t, a, ...)      #t, __SC_STR_TDECL5(__VA_ARGS__)
+#define __SC_STR_ADECL(t, a)    #a
+#define __SC_STR_TDECL(t, a)    #t
 
 extern struct ftrace_event_class event_class_syscall_enter;
 extern struct ftrace_event_class event_class_syscall_exit;
@@ -155,7 +140,13 @@ extern struct trace_event_functions exit_syscall_print_funcs;
           __attribute__((section("_ftrace_events")))                    \
         *__event_exit_##sname = &event_exit_##sname;
 
-#define SYSCALL_METADATA(sname, nb)                             \
+#define SYSCALL_METADATA(sname, nb, ...)                        \
+        static const char *types_##sname[] = {                  \
+                __MAP(nb,__SC_STR_TDECL,__VA_ARGS__)            \
+        };                                                      \
+        static const char *args_##sname[] = {                   \
+                __MAP(nb,__SC_STR_ADECL,__VA_ARGS__)            \
+        };                                                      \
         SYSCALL_TRACE_ENTER_EVENT(sname);                       \
         SYSCALL_TRACE_EXIT_EVENT(sname);                        \
         static struct syscall_metadata __used                   \
@@ -163,8 +154,8 @@ extern struct trace_event_functions exit_syscall_print_funcs;
                 .name           = "sys"#sname,                  \
                 .syscall_nr     = -1,   /* Filled in at boot */ \
                 .nb_args        = nb,                           \
-                .types          = types_##sname,                \
-                .args           = args_##sname,                 \
+                .types          = nb ? types_##sname : NULL,    \
+                .args           = nb ? args_##sname : NULL,     \
                 .enter_event    = &event_enter_##sname,         \
                 .exit_event     = &event_exit_##sname,          \
                 .enter_fields   = LIST_HEAD_INIT(__syscall_meta_##sname.enter_fields), \
@@ -172,26 +163,13 @@ extern struct trace_event_functions exit_syscall_print_funcs;
         static struct syscall_metadata __used                   \
           __attribute__((section("__syscalls_metadata")))       \
          *__p_syscall_meta_##sname = &__syscall_meta_##sname;
+#else
+#define SYSCALL_METADATA(sname, nb, ...)
+#endif
 
 #define SYSCALL_DEFINE0(sname)                                  \
-        SYSCALL_TRACE_ENTER_EVENT(_##sname);                    \
-        SYSCALL_TRACE_EXIT_EVENT(_##sname);                     \
-        static struct syscall_metadata __used                   \
-          __syscall_meta__##sname = {                           \
-                .name           = "sys_"#sname,                 \
-                .syscall_nr     = -1,   /* Filled in at boot */ \
-                .nb_args        = 0,                            \
-                .enter_event    = &event_enter__##sname,        \
-                .exit_event     = &event_exit__##sname,         \
-                .enter_fields   = LIST_HEAD_INIT(__syscall_meta__##sname.enter_fields), \
-        };                                                      \
-        static struct syscall_metadata __used                   \
-          __attribute__((section("__syscalls_metadata")))       \
-         *__p_syscall_meta_##sname = &__syscall_meta__##sname;  \
+        SYSCALL_METADATA(_##sname, 0);                          \
         asmlinkage long sys_##sname(void)
-#else
-#define SYSCALL_DEFINE0(name)      asmlinkage long sys_##name(void)
-#endif
 
 #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
 #define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
@@ -200,57 +178,23 @@ extern struct trace_event_functions exit_syscall_print_funcs;
 #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
 #define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
 
-#ifdef CONFIG_PPC64
-#define SYSCALL_ALIAS(alias, name)                                      \
-        asm ("\t.globl " #alias "\n\t.set " #alias ", " #name "\n"      \
-             "\t.globl ." #alias "\n\t.set ." #alias ", ." #name)
-#else
-#if defined(CONFIG_ALPHA) || defined(CONFIG_MIPS)
-#define SYSCALL_ALIAS(alias, name)                                      \
-        asm ( #alias " = " #name "\n\t.globl " #alias)
-#else
-#define SYSCALL_ALIAS(alias, name)                                      \
-        asm ("\t.globl " #alias "\n\t.set " #alias ", " #name)
-#endif
-#endif
-
-#ifdef CONFIG_FTRACE_SYSCALLS
 #define SYSCALL_DEFINEx(x, sname, ...)                          \
-        static const char *types_##sname[] = {                  \
-                __SC_STR_TDECL##x(__VA_ARGS__)                  \
-        };                                                      \
-        static const char *args_##sname[] = {                   \
-                __SC_STR_ADECL##x(__VA_ARGS__)                  \
-        };                                                      \
-        SYSCALL_METADATA(sname, x);                             \
+        SYSCALL_METADATA(sname, x, __VA_ARGS__)                 \
         __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
-#else
-#define SYSCALL_DEFINEx(x, sname, ...)                          \
-        __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
-#endif
-
-#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
-
-#define SYSCALL_DEFINE(name) static inline long SYSC_##name
 
+#define __PROTECT(...) asmlinkage_protect(__VA_ARGS__)
 #define __SYSCALL_DEFINEx(x, name, ...)                                 \
-        asmlinkage long sys##name(__SC_DECL##x(__VA_ARGS__));           \
-        static inline long SYSC##name(__SC_DECL##x(__VA_ARGS__));       \
-        asmlinkage long SyS##name(__SC_LONG##x(__VA_ARGS__))            \
+        asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));      \
+        static inline long SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));  \
+        asmlinkage long SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))       \
         {                                                               \
-                __SC_TEST##x(__VA_ARGS__);                              \
-                return (long) SYSC##name(__SC_CAST##x(__VA_ARGS__));    \
+                long ret = SYSC##name(__MAP(x,__SC_CAST,__VA_ARGS__));  \
+                __MAP(x,__SC_TEST,__VA_ARGS__);                         \
+                __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__));       \
+                return ret;                                             \
         }                                                               \
         SYSCALL_ALIAS(sys##name, SyS##name);                            \
-        static inline long SYSC##name(__SC_DECL##x(__VA_ARGS__))
-
-#else /* CONFIG_HAVE_SYSCALL_WRAPPERS */
-
-#define SYSCALL_DEFINE(name) asmlinkage long sys_##name
-#define __SYSCALL_DEFINEx(x, name, ...)                                 \
-        asmlinkage long sys##name(__SC_DECL##x(__VA_ARGS__))
-
-#endif /* CONFIG_HAVE_SYSCALL_WRAPPERS */
+        static inline long SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
 
 asmlinkage long sys_time(time_t __user *tloc);
 asmlinkage long sys_stime(time_t __user *tptr);
@@ -694,7 +638,7 @@ asmlinkage long sys_msgctl(int msqid, int cmd, struct msqid_ds __user *buf);
 asmlinkage long sys_semget(key_t key, int nsems, int semflg);
 asmlinkage long sys_semop(int semid, struct sembuf __user *sops,
                                 unsigned nsops);
-asmlinkage long sys_semctl(int semid, int semnum, int cmd, union semun arg);
+asmlinkage long sys_semctl(int semid, int semnum, int cmd, unsigned long arg);
 asmlinkage long sys_semtimedop(int semid, struct sembuf __user *sops,
                                 unsigned nsops,
                                 const struct timespec __user *timeout);