[PATCH v2 02/17] y2038: Remove newstat family from default syscall set
From: Arnd Bergmann <arnd@arndb.de>
Date: 2018-07-16 16:40:15
Also in:
linux-api, linux-arch
Subsystem:
alpha port, arm port, arm64 port (aarch64 architecture), filesystems (vfs and infrastructure), linux for powerpc (32-bit and 64-bit), m68k architecture, microblaze architecture, mips, parisc architecture, s390 architecture, sparc + ultrasparc (sparc/sparc64), superh, tensilica xtensa port (xtensa), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Richard Henderson, Matt Turner, Magnus Lindholm, Russell King, Catalin Marinas, Will Deacon, Alexander Viro, Christian Brauner, Madhavan Srinivasan, Michael Ellerman, Geert Uytterhoeven, Michal Simek, Thomas Bogendoerfer, "James E.J. Bottomley", Helge Deller, Heiko Carstens, Vasily Gorbik, Alexander Gordeev, "David S. Miller", Andreas Larsson, Yoshinori Sato, Rich Felker, John Paul Adrian Glaubitz, Chris Zankel, Max Filippov, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
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 <geert@linux-m68k.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- 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 <uapi/asm/unistd.h> #include <asm/unistd-nr.h> +#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 <asm-generic/unistd.h>
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 <linux/types.h>
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 <linux/compiler.h> #include <linux/linkage.h> +#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 <asm/unistd_64.h> # 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 <uapi/asm/unistd.h> +#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)
--
2.9.0