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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-22 16:09:17 +0300
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 21:16:18 +0300
commit3e2052e5dd4062ccc7a10e8860aa7d2e58627001 (patch)
tree0597bf56694c0c24c19198ea0f85c1495ad5c329 /include/linux/compat.h
parentc679a08983db7c1eb09930570b92ff7c9fd59c1c (diff)
downloadlinux-3e2052e5dd4062ccc7a10e8860aa7d2e58627001.tar.xz
syscalls/x86: auto-create compat_sys_*() prototypes
compat_sys_*() functions are no longer called from within the kernel on x86 except from the system call table. Linking the system call does not require compat_sys_*() function prototypes at least on x86. Therefore, generate compat_sys_*() prototypes on-the-fly within the COMPAT_SYSCALL_DEFINEx() macro, and remove x86-specific prototypes from various header files. Suggested-by: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: David S. Miller <davem@davemloft.net> Cc: netdev@vger.kernel.org Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: x86@kernel.org Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'include/linux/compat.h')
-rw-r--r--include/linux/compat.h17
1 files changed, 3 insertions, 14 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h
index f881cce627f6..8cb8710db0ab 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -49,6 +49,7 @@
COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
+ asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))\
__attribute__((alias(__stringify(compat_SyS##name)))); \
static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
@@ -507,8 +508,8 @@ int __compat_save_altstack(compat_stack_t __user *, unsigned long);
/*
* These syscall function prototypes are kept in the same order as
- * include/uapi/asm-generic/unistd.h. Architecture specific entries go below,
- * followed by deprecated or obsolete system calls.
+ * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
+ * go below.
*
* Please note that these prototypes here are only provided for information
* purposes, for static analysis, and for linking from the syscall table.
@@ -883,18 +884,6 @@ asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
/*
- * Architecture-specific system calls
- */
-
-/* fs/quota/compat.c -- x86 only */
-asmlinkage long compat_sys_quotactl32(unsigned int cmd,
- const char __user *special, qid_t id, void __user *addr);
-
-/* arch_prctl -- x86 */
-asmlinkage long compat_sys_arch_prctl(int option, unsigned long arg2);
-
-
-/*
* Deprecated system calls which are still defined in
* include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
*/