asm-generic: Remove unneeded __ARCH_WANT_SYS_LLSEEK macro

The sys_llseek sytem call is needed on all 32-bit architectures and
none of the 64-bit ones, so we can remove the __ARCH_WANT_SYS_LLSEEK guard
and simplify the include/asm-generic/unistd.h header further.

Since 32-bit tasks can run either natively or in compat mode on 64-bit
architectures, we have to check for both !CONFIG_64BIT and CONFIG_COMPAT.

There are a few 64-bit architectures that also reference sys_llseek
in their 64-bit ABI (e.g. sparc), but I verified that those all
select CONFIG_COMPAT, so the #if check is still correct here. It's
a bit odd to include it in the syscall table though, as it's the
same as sys_lseek() on 64-bit, but with strange calling conventions.

Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h
index 07e58010d5972e3761042f7a151e13dc57b783da..8f1159c26f20e538685dd2a0f7ad6f73cb1c4449 100644 (file)
--- a/arch/arm/include/asm/unistd.h
+++ b/arch/arm/include/asm/unistd.h
@@ -21,7 +21,6 @@
 #define __ARCH_WANT_SYS_GETHOSTNAME
 #define __ARCH_WANT_SYS_PAUSE
 #define __ARCH_WANT_SYS_GETPGRP
-#define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_SIGPENDING
 #define __ARCH_WANT_SYS_SIGPROCMASK

diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index e0d0f5b856e74589404de44c8ca4323e454973ec..2af308f13463b22000e6af8aa9f8020f2d3747e1 100644 (file)
--- a/arch/arm64/include/asm/unistd.h
+++ b/arch/arm64/include/asm/unistd.h
@@ -18,7 +18,6 @@
 #define __ARCH_WANT_SYS_GETHOSTNAME
 #define __ARCH_WANT_SYS_PAUSE
 #define __ARCH_WANT_SYS_GETPGRP
-#define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_SIGPENDING
 #define __ARCH_WANT_SYS_SIGPROCMASK

diff --git a/arch/m68k/include/asm/unistd.h b/arch/m68k/include/asm/unistd.h
index db22cdadc38a9f6c2b7bec4aecf8e373eeba55c3..e680031bda7b285a94d30b0fad1e2d8b04e559e8 100644 (file)
--- a/arch/m68k/include/asm/unistd.h
+++ b/arch/m68k/include/asm/unistd.h
@@ -22,7 +22,6 @@
 #define __ARCH_WANT_SYS_SOCKETCALL
 #define __ARCH_WANT_SYS_FADVISE64
 #define __ARCH_WANT_SYS_GETPGRP
-#define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_OLD_GETRLIMIT
 #define __ARCH_WANT_SYS_OLD_MMAP

diff --git a/arch/microblaze/include/asm/unistd.h b/arch/microblaze/include/asm/unistd.h
index a28dc770c9b23eef1f9552b83268cc48ea1768f7..f42c40f5001b646c6fdbe86e9a36ceae6d65bcb1 100644 (file)
--- a/arch/microblaze/include/asm/unistd.h
+++ b/arch/microblaze/include/asm/unistd.h
@@ -27,7 +27,6 @@
 #define __ARCH_WANT_SYS_SOCKETCALL
 #define __ARCH_WANT_SYS_FADVISE64
 #define __ARCH_WANT_SYS_GETPGRP
-#define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 /* #define __ARCH_WANT_SYS_OLD_GETRLIMIT */
 #define __ARCH_WANT_SYS_OLDUMOUNT

diff --git a/arch/mips/include/asm/unistd.h b/arch/mips/include/asm/unistd.h
index d7878b3e16d83702d5cfbc1081a8eea7fc51cf4a..c2174b80e50ed2cc2675a8e376a5f9b3c5e67794 100644 (file)
--- a/arch/mips/include/asm/unistd.h
+++ b/arch/mips/include/asm/unistd.h
@@ -34,7 +34,6 @@
 #define __ARCH_WANT_SYS_WAITPID
 #define __ARCH_WANT_SYS_SOCKETCALL
 #define __ARCH_WANT_SYS_GETPGRP
-#define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_OLD_UNAME
 #define __ARCH_WANT_SYS_OLDUMOUNT

diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h
index b36273bacca7ead0d1eb47c961500ea5239a05bb..a0c38374fff02dfc85dc6eed3c3336e117cbc717 100644 (file)
--- a/arch/parisc/include/asm/unistd.h
+++ b/arch/parisc/include/asm/unistd.h
@@ -156,7 +156,6 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5)       \
 #define __ARCH_WANT_SYS_SOCKETCALL
 #define __ARCH_WANT_SYS_FADVISE64
 #define __ARCH_WANT_SYS_GETPGRP
-#define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_OLDUMOUNT
 #define __ARCH_WANT_SYS_SIGPENDING

diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h
index 8b37e01817be45444c7b49a22b56a93676b72872..9326c9133516f63dc037036eec2734ac235280c3 100644 (file)
--- a/arch/powerpc/include/asm/unistd.h
+++ b/arch/powerpc/include/asm/unistd.h
@@ -36,7 +36,6 @@
 #define __ARCH_WANT_SYS_SOCKETCALL
 #define __ARCH_WANT_SYS_FADVISE64
 #define __ARCH_WANT_SYS_GETPGRP
-#define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_OLD_GETRLIMIT
 #define __ARCH_WANT_SYS_OLD_UNAME

diff --git a/arch/s390/include/asm/unistd.h b/arch/s390/include/asm/unistd.h
index 1d181373288a426bc8a6b8be256aa873dbed95ca..a2d583ea526d2f8753f54e75861f1f3e0fda5161 100644 (file)
--- a/arch/s390/include/asm/unistd.h
+++ b/arch/s390/include/asm/unistd.h
@@ -26,7 +26,6 @@
 #define __ARCH_WANT_SYS_IPC
 #define __ARCH_WANT_SYS_FADVISE64
 #define __ARCH_WANT_SYS_GETPGRP
-#define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_OLD_GETRLIMIT
 #define __ARCH_WANT_SYS_OLD_MMAP

diff --git a/arch/sh/include/asm/unistd.h b/arch/sh/include/asm/unistd.h
index a845b57eac694ae6e3ebcde8a203220823a2559a..a99234b61051297fb1e13dc60070b0b66581e916 100644 (file)
--- a/arch/sh/include/asm/unistd.h
+++ b/arch/sh/include/asm/unistd.h
@@ -20,7 +20,6 @@
 # define __ARCH_WANT_SYS_SOCKETCALL
 # define __ARCH_WANT_SYS_FADVISE64
 # define __ARCH_WANT_SYS_GETPGRP
-# define __ARCH_WANT_SYS_LLSEEK
 # define __ARCH_WANT_SYS_NICE
 # define __ARCH_WANT_SYS_OLD_GETRLIMIT
 # define __ARCH_WANT_SYS_OLD_UNAME

diff --git a/arch/sparc/include/asm/unistd.h b/arch/sparc/include/asm/unistd.h
index 3544244685e1b33c961355d2b5d9278bb6ee721f..f7514d3eae7b7fa8946fd6aec308d96175130070 100644 (file)
--- a/arch/sparc/include/asm/unistd.h
+++ b/arch/sparc/include/asm/unistd.h
@@ -34,7 +34,6 @@
 #define __ARCH_WANT_SYS_SOCKETCALL
 #define __ARCH_WANT_SYS_FADVISE64
 #define __ARCH_WANT_SYS_GETPGRP
-#define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_NICE
 #define __ARCH_WANT_SYS_OLDUMOUNT
 #define __ARCH_WANT_SYS_SIGPENDING

diff --git a/arch/x86/include/asm/unistd.h b/arch/x86/include/asm/unistd.h
index 35b66bbf8028d79a821d010e31da3843580c0312..153d2a5e6b0279f62ba1468c06a9f6c243a29bed 100644 (file)
--- a/arch/x86/include/asm/unistd.h
+++ b/arch/x86/include/asm/unistd.h
@@ -38,7 +38,6 @@
 # define __ARCH_WANT_SYS_FADVISE64
 # define __ARCH_WANT_SYS_GETHOSTNAME
 # define __ARCH_WANT_SYS_GETPGRP
-# define __ARCH_WANT_SYS_LLSEEK
 # define __ARCH_WANT_SYS_NICE
 # define __ARCH_WANT_SYS_OLDUMOUNT
 # define __ARCH_WANT_SYS_OLD_GETRLIMIT

diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h
index 0d532ab60b3701b8d32b5e0d23e9d5e071774b85..574e5520968c263e3147271abca3f4eba4df3378 100644 (file)
--- a/arch/xtensa/include/asm/unistd.h
+++ b/arch/xtensa/include/asm/unistd.h
@@ -8,7 +8,6 @@
 #define __ARCH_WANT_NEW_STAT
 #define __ARCH_WANT_STAT64
 #define __ARCH_WANT_SYS_UTIME
-#define __ARCH_WANT_SYS_LLSEEK
 #define __ARCH_WANT_SYS_GETPGRP
 
 /* 

diff --git a/fs/read_write.c b/fs/read_write.c
index 39b4a21dd9337a157927c1f8d0d741190de11e78..e892e409386b0f411af69f67f96d7d92d15dff89 100644 (file)
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -331,7 +331,7 @@ COMPAT_SYSCALL_DEFINE3(lseek, unsigned int, fd, compat_off_t, offset, unsigned i
 }
 #endif
 
-#ifdef __ARCH_WANT_SYS_LLSEEK
+#if !defined(CONFIG_64BIT) || defined(CONFIG_COMPAT)
 SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high,
                unsigned long, offset_low, loff_t __user *, result,
                unsigned int, whence)

diff --git a/include/asm-generic/unistd.h b/include/asm-generic/unistd.h
index ea74eca8463f18278624d100743bb897c18aefae..71d2fcf9dbcd165e34a173a92e38861c694771d1 100644 (file)
--- a/include/asm-generic/unistd.h
+++ b/include/asm-generic/unistd.h
@@ -1,12 +1,3 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #include <uapi/asm-generic/unistd.h>
 #include <linux/export.h>
-
-/*
- * These are required system calls, we should
- * invert the logic eventually and let them
- * be selected by default.
- */
-#if __BITS_PER_LONG == 32
-#define __ARCH_WANT_SYS_LLSEEK
-#endif