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authorArnd Bergmann <arnd@arndb.de>2018-04-13 12:57:26 +0200
committerArnd Bergmann <arnd@arndb.de>2018-08-29 15:42:21 +0200
commitcaf6f9c8a326cffd1d4b3ff3f1cfba75d159d70b (patch)
treefa0e60247e82d051fef5a30f55ccbb42d7fe332e /fs
parentfb3739759474d150a9927b920a80ea2afb4c2a51 (diff)
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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>
Diffstat (limited to 'fs')
-rw-r--r--fs/read_write.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index 39b4a21dd933..e892e409386b 100644
--- 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)