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authorHeiko Carstens <heiko.carstens@de.ibm.com>2014-03-03 10:44:03 +0100
committerHeiko Carstens <heiko.carstens@de.ibm.com>2014-03-04 09:05:33 +0100
commit0473c9b5f05948df780bbc7b996dd7aefc4ec41d (patch)
tree3413bbef3bcaa444bb051f7a9c9de9579d0e0374 /include/linux/compat.h
parent0414855fdc4a40da05221fc6062cccbc0c30f169 (diff)
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op-kernel-dev-0473c9b5f05948df780bbc7b996dd7aefc4ec41d.tar.gz
compat: let architectures define __ARCH_WANT_COMPAT_SYS_GETDENTS64
For architecture dependent compat syscalls in common code an architecture must define something like __ARCH_WANT_<WHATEVER> if it wants to use the code. This however is not true for compat_sys_getdents64 for which architectures must define __ARCH_OMIT_COMPAT_SYS_GETDENTS64 if they do not want the code. This leads to the situation where all architectures, except mips, get the compat code but only x86_64, arm64 and the generic syscall architectures actually use it. So invert the logic, so that architectures actively must do something to get the compat code. This way a couple of architectures get rid of otherwise dead code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'include/linux/compat.h')
-rw-r--r--include/linux/compat.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 3f448c6..beded18 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -502,9 +502,11 @@ asmlinkage long compat_sys_old_readdir(unsigned int fd,
asmlinkage long compat_sys_getdents(unsigned int fd,
struct compat_linux_dirent __user *dirent,
unsigned int count);
+#ifdef __ARCH_WANT_COMPAT_SYS_GETDENTS64
asmlinkage long compat_sys_getdents64(unsigned int fd,
struct linux_dirent64 __user *dirent,
unsigned int count);
+#endif
asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
unsigned int nr_segs, unsigned int flags);
asmlinkage long compat_sys_open(const char __user *filename, int flags,
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