From patchwork Mon Jul 16 16:10:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 28418 Received: (qmail 25832 invoked by alias); 16 Jul 2018 16:12:34 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 23487 invoked by uid 89); 16 Jul 2018 16:12:16 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-25.8 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, KAM_LAZY_DOMAIN_SECURITY, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.2 spammy= X-HELO: mout.kundenserver.de From: Arnd Bergmann To: tglx@linutronix.de Cc: y2038@lists.linaro.org, hch@infradead.org, linux-api@vger.kernel.org, linux-arch@vger.kernel.org, libc-alpha@sourceware.org, albert.aribaud@3adev.fr, netdev@vger.kernel.org, viro@zeniv.linux.org.uk, peterz@infradead.org, dvhart@infradead.org, ebiederm@xmission.com, linux@dominikbrodowski.net, Arnd Bergmann Subject: [PATCH v2 02/17] y2038: Remove newstat family from default syscall set Date: Mon, 16 Jul 2018 18:10:48 +0200 Message-Id: <20180716161103.16239-3-arnd@arndb.de> In-Reply-To: <20180716161103.16239-1-arnd@arndb.de> References: <20180716161103.16239-1-arnd@arndb.de> We have four generations of stat() syscalls: - the oldstat syscalls that are only used on the older architectures - the newstat family that is used on all 64-bit architectures but lacked support for large files on 32-bit architectures. - the stat64 family that is used mostly on 32-bit architectures to replace newstat - statx() to replace all of the above, adding 64-bit timestamps among other things. We already compile stat64 only on those architectures that need it, but newstat is always built, including on those that don't reference it. This adds a new __ARCH_WANT_NEW_STAT symbol along the lines of __ARCH_WANT_OLD_STAT and __ARCH_WANT_STAT64 to control compilation of newstat. All architectures that need it use an explict define, the others now get a little bit smaller, and future architecture (including 64-bit targets) won't ever see it. Acked-by: Geert Uytterhoeven Signed-off-by: Arnd Bergmann --- arch/alpha/include/asm/unistd.h | 1 + arch/arm/include/asm/unistd.h | 1 + arch/arm64/include/uapi/asm/unistd.h | 1 + arch/ia64/include/asm/unistd.h | 2 ++ arch/m68k/include/asm/unistd.h | 1 + arch/microblaze/include/asm/unistd.h | 1 + arch/mips/include/asm/unistd.h | 1 + arch/parisc/include/asm/unistd.h | 1 + arch/powerpc/include/asm/unistd.h | 1 + arch/s390/include/asm/unistd.h | 1 + arch/sh/include/asm/unistd.h | 1 + arch/sparc/include/asm/unistd.h | 1 + arch/x86/include/asm/unistd.h | 1 + arch/xtensa/include/asm/unistd.h | 1 + fs/stat.c | 3 +++ 15 files changed, 18 insertions(+) diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm/unistd.h index d6e29a1de4cc..edc090470023 100644 --- a/arch/alpha/include/asm/unistd.h +++ b/arch/alpha/include/asm/unistd.h @@ -6,6 +6,7 @@ #define NR_SYSCALLS 523 +#define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_OLD_READDIR #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_GETHOSTNAME diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h index 076090d2dbf5..07e58010d597 100644 --- a/arch/arm/include/asm/unistd.h +++ b/arch/arm/include/asm/unistd.h @@ -16,6 +16,7 @@ #include #include +#define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_GETHOSTNAME #define __ARCH_WANT_SYS_PAUSE diff --git a/arch/arm64/include/uapi/asm/unistd.h b/arch/arm64/include/uapi/asm/unistd.h index 5072cbd15c82..dae1584cf017 100644 --- a/arch/arm64/include/uapi/asm/unistd.h +++ b/arch/arm64/include/uapi/asm/unistd.h @@ -16,5 +16,6 @@ */ #define __ARCH_WANT_RENAMEAT +#define __ARCH_WANT_NEW_STAT #include diff --git a/arch/ia64/include/asm/unistd.h b/arch/ia64/include/asm/unistd.h index ffb705dc9c13..c5b2620c4a4c 100644 --- a/arch/ia64/include/asm/unistd.h +++ b/arch/ia64/include/asm/unistd.h @@ -28,6 +28,8 @@ #define __IGNORE_vfork /* clone() */ #define __IGNORE_umount2 /* umount() */ +#define __ARCH_WANT_NEW_STAT + #if !defined(__ASSEMBLY__) && !defined(ASSEMBLER) #include diff --git a/arch/m68k/include/asm/unistd.h b/arch/m68k/include/asm/unistd.h index 30d0d3fbd4ef..db22cdadc38a 100644 --- a/arch/m68k/include/asm/unistd.h +++ b/arch/m68k/include/asm/unistd.h @@ -7,6 +7,7 @@ #define NR_syscalls 380 +#define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_OLD_READDIR #define __ARCH_WANT_OLD_STAT #define __ARCH_WANT_STAT64 diff --git a/arch/microblaze/include/asm/unistd.h b/arch/microblaze/include/asm/unistd.h index a62d09420a47..a28dc770c9b2 100644 --- a/arch/microblaze/include/asm/unistd.h +++ b/arch/microblaze/include/asm/unistd.h @@ -15,6 +15,7 @@ /* #define __ARCH_WANT_OLD_READDIR */ /* #define __ARCH_WANT_OLD_STAT */ +#define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_ALARM #define __ARCH_WANT_SYS_GETHOSTNAME diff --git a/arch/mips/include/asm/unistd.h b/arch/mips/include/asm/unistd.h index 3c09450908aa..d7878b3e16d8 100644 --- a/arch/mips/include/asm/unistd.h +++ b/arch/mips/include/asm/unistd.h @@ -24,6 +24,7 @@ #ifndef __ASSEMBLY__ +#define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_OLD_READDIR #define __ARCH_WANT_SYS_ALARM #define __ARCH_WANT_SYS_GETHOSTNAME diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h index 3d507d04eb4c..b36273bacca7 100644 --- a/arch/parisc/include/asm/unistd.h +++ b/arch/parisc/include/asm/unistd.h @@ -141,6 +141,7 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) \ return K_INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5); \ } +#define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_OLD_READDIR #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_ALARM diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h index c19379f0a32e..8b37e01817be 100644 --- a/arch/powerpc/include/asm/unistd.h +++ b/arch/powerpc/include/asm/unistd.h @@ -22,6 +22,7 @@ #include #include +#define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_OLD_READDIR #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_ALARM diff --git a/arch/s390/include/asm/unistd.h b/arch/s390/include/asm/unistd.h index fd79c0d35dc4..1d181373288a 100644 --- a/arch/s390/include/asm/unistd.h +++ b/arch/s390/include/asm/unistd.h @@ -15,6 +15,7 @@ #define __IGNORE_pkey_alloc #define __IGNORE_pkey_free +#define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_OLD_READDIR #define __ARCH_WANT_SYS_ALARM #define __ARCH_WANT_SYS_GETHOSTNAME diff --git a/arch/sh/include/asm/unistd.h b/arch/sh/include/asm/unistd.h index b36200af9ce7..a845b57eac69 100644 --- a/arch/sh/include/asm/unistd.h +++ b/arch/sh/include/asm/unistd.h @@ -5,6 +5,7 @@ # include # endif +# define __ARCH_WANT_NEW_STAT # define __ARCH_WANT_OLD_READDIR # define __ARCH_WANT_OLD_STAT # define __ARCH_WANT_STAT64 diff --git a/arch/sparc/include/asm/unistd.h b/arch/sparc/include/asm/unistd.h index b2a6a955113e..3544244685e1 100644 --- a/arch/sparc/include/asm/unistd.h +++ b/arch/sparc/include/asm/unistd.h @@ -21,6 +21,7 @@ #else #define __NR_time 231 /* Linux sparc32 */ #endif +#define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_OLD_READDIR #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_ALARM diff --git a/arch/x86/include/asm/unistd.h b/arch/x86/include/asm/unistd.h index 51c4eee00732..35b66bbf8028 100644 --- a/arch/x86/include/asm/unistd.h +++ b/arch/x86/include/asm/unistd.h @@ -31,6 +31,7 @@ # endif +# define __ARCH_WANT_NEW_STAT # define __ARCH_WANT_OLD_READDIR # define __ARCH_WANT_OLD_STAT # define __ARCH_WANT_SYS_ALARM diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h index ed66db3bc9bb..0d532ab60b37 100644 --- a/arch/xtensa/include/asm/unistd.h +++ b/arch/xtensa/include/asm/unistd.h @@ -5,6 +5,7 @@ #define __ARCH_WANT_SYS_CLONE #include +#define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_UTIME #define __ARCH_WANT_SYS_LLSEEK diff --git a/fs/stat.c b/fs/stat.c index f8e6fb2c3657..adbfcd86c81b 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -280,6 +280,8 @@ SYSCALL_DEFINE2(fstat, unsigned int, fd, struct __old_kernel_stat __user *, stat #endif /* __ARCH_WANT_OLD_STAT */ +#ifdef __ARCH_WANT_NEW_STAT + #if BITS_PER_LONG == 32 # define choose_32_64(a,b) a #else @@ -378,6 +380,7 @@ SYSCALL_DEFINE2(newfstat, unsigned int, fd, struct stat __user *, statbuf) return error; } +#endif static int do_readlinkat(int dfd, const char __user *pathname, char __user *buf, int bufsiz)