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Clean up kernel version conditionals for pre-2.6.32 kernels.

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This patch does some initial cleanup, following the move to 2.6.32
minimum kernel version, by removing __LINUX_KERNEL_VERSION
conditionals that are now always-true or always-false.  In the case of
__ASSUME_ARG_MAX_STACK_BASED, where the conditional used a kernel
version that was itself in a macro, the associated sysconf.c code is
also cleaned up and __ASSUME_ARG_MAX_STACK_BASED removed completely.

Tested x86_64 that disassembly of installed shared libraries is
unchanged by the patch.

	* sysdeps/unix/sysv/linux/kernel-features.h [__s390__]
	(__ASSUME_UTIMES): Do not condition on kernel version.
	(__ASSUME_PSELECT): Define unconditionally.
	(__ASSUME_PPOLL): Likewise.
	(__ASSUME_ATFCTS): Likewise.
	(__ASSUME_SET_ROBUST_LIST): Do not condition on kernel version.
	(__ASSUME_COMPLETE_READV_WRITEV): Define unconditionally.
	(__ASSUME_FUTEX_LOCK_PI): Do not condition on kernel version.
	(__ASSUME_UTIMENSAT): Define unconditionally.
	(__ASSUME_PRIVATE_FUTEX): Likewise.
	(__ASSUME_FALLOCATE): Likewise.
	(__ASSUME_O_CLOEXEC): Likewise.
	(__LINUX_ARG_MAX_STACK_BASED_MIN_KERNEL): Remove.
	(__ASSUME_ARG_MAX_STACK_BASED): Likewise.
	(__ASSUME_ADJ_OFFSET_SS_READ): Define unconditionally.
	(__ASSUME_SOCK_CLOEXEC): Do not condition on kernel version.
	(__ASSUME_IN_NONBLOCK): Likewise.
	(__ASSUME_PIPE2): Likewise.
	(__ASSUME_EVENTFD2): Likewise.
	(__ASSUME_SIGNALFD4): Likewise.
	(__ASSUME_DUP3): Likewise.
	[__x86_64__ || __sparc__] (__ASSUME_ACCEPT4_SYSCALL): Likewise.
	(__ASSUME_FUTEX_CLOCK_REALTIME): Define unconditionally.
	(__ASSUME_AT_RANDOM): Likewise.
	(__ASSUME_PREADV): Likewise.
	(__ASSUME_PWRITEV): Likewise.
	(__ASSUME_REQUEUE_PI): Do not condition on kernel version.
	(__ASSUME_F_GETOWN_EX): Define unconditionally.
	(__ASSUME_XFS_RESTRICTED_CHOWN): Likewise.
	* sysdeps/unix/sysv/linux/sysconf.c (__sysconf)
	[!__ASSUME_ARG_MAX_STACK_BASED]: Remove conditional code.
	* sysdeps/unix/sysv/linux/alpha/kernel-features.h
	(__ASSUME_O_CLOEXEC): Define unconditionally.
	(__ASSUME_PSELECT): Do not undefine conditionally.
	(__ASSUME_PPOLL): Likewise.
	(__ASSUME_ATFCTS): Likewise.
	(__ASSUME_SET_ROBUST_LIST): Likewise.
	(__ASSUME_UTIMENSAT): Likewise.
	(__ASSUME_FDATASYNC): Define unconditionally.
	* sysdeps/unix/sysv/linux/arm/kernel-features.h
	(__ASSUME_SIGFRAME_V2): Likewise.
	)__ASSUME_EVENTFD2): Likewise.
	(__ASSUME_SIGNALFD4): Likewise.
	(__ASSUME_PSELECT): Do not undefine conditionally.
	(__ASSUME_PPOLL): Likewise.
	* sysdeps/unix/sysv/linux/ia64/kernel-features.h
	(__ASSUME_PSELECT): Define unconditionally.
	(__ASSUME_PPOLL): Likewise.
	(__ASSUME_O_CLOEXEC): Likewise.
	(__ASSUME_SOCK_CLOEXEC): Likewise.
	(__ASSUME_IN_NONBLOCK): Likewise.
	(__ASSUME_PIPE2): Likewise.
	(__ASSUME_EVENTFD2): Likewise.
	(__ASSUME_SIGNALFD4): Likewise.
	(__ASSUME_DUP3): Likewise.
	* sysdeps/unix/sysv/linux/m68k/kernel-features.h
	(__ASSUME_O_CLOEXEC): Likewise.
	(__ASSUME_SOCK_CLOEXEC): Likewise.
	(__ASSUME_IN_NONBLOCK): Likewise.
	(__ASSUME_PIPE2): Likewise.
	(__ASSUME_EVENTFD2): Likewise.
	(__ASSUME_SIGNALFD4): Likewise.
	(__ASSUME_DUP3): Likewise.
	* sysdeps/unix/sysv/linux/mips/kernel-features.h
	(__ASSUME_EVENTFD2): Likewise.
	(__ASSUME_SIGNALFD4): Likewise.
	(__ASSUME_ACCEPT4_SYSCALL): Likewise.
This commit is contained in:
Joseph Myers
2014-05-12 22:48:25 +00:00
parent 315eb1d86a
commit 637461d965
8 changed files with 126 additions and 162 deletions
Download Patch File Download Diff File Expand all files Collapse all files

70
ChangeLog
View File

@ -1,3 +1,73 @@
2014-05-12 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/kernel-features.h [__s390__]
(__ASSUME_UTIMES): Do not condition on kernel version.
(__ASSUME_PSELECT): Define unconditionally.
(__ASSUME_PPOLL): Likewise.
(__ASSUME_ATFCTS): Likewise.
(__ASSUME_SET_ROBUST_LIST): Do not condition on kernel version.
(__ASSUME_COMPLETE_READV_WRITEV): Define unconditionally.
(__ASSUME_FUTEX_LOCK_PI): Do not condition on kernel version.
(__ASSUME_UTIMENSAT): Define unconditionally.
(__ASSUME_PRIVATE_FUTEX): Likewise.
(__ASSUME_FALLOCATE): Likewise.
(__ASSUME_O_CLOEXEC): Likewise.
(__LINUX_ARG_MAX_STACK_BASED_MIN_KERNEL): Remove.
(__ASSUME_ARG_MAX_STACK_BASED): Likewise.
(__ASSUME_ADJ_OFFSET_SS_READ): Define unconditionally.
(__ASSUME_SOCK_CLOEXEC): Do not condition on kernel version.
(__ASSUME_IN_NONBLOCK): Likewise.
(__ASSUME_PIPE2): Likewise.
(__ASSUME_EVENTFD2): Likewise.
(__ASSUME_SIGNALFD4): Likewise.
(__ASSUME_DUP3): Likewise.
[__x86_64__ || __sparc__] (__ASSUME_ACCEPT4_SYSCALL): Likewise.
(__ASSUME_FUTEX_CLOCK_REALTIME): Define unconditionally.
(__ASSUME_AT_RANDOM): Likewise.
(__ASSUME_PREADV): Likewise.
(__ASSUME_PWRITEV): Likewise.
(__ASSUME_REQUEUE_PI): Do not condition on kernel version.
(__ASSUME_F_GETOWN_EX): Define unconditionally.
(__ASSUME_XFS_RESTRICTED_CHOWN): Likewise.
* sysdeps/unix/sysv/linux/sysconf.c (__sysconf)
[!__ASSUME_ARG_MAX_STACK_BASED]: Remove conditional code.
* sysdeps/unix/sysv/linux/alpha/kernel-features.h
(__ASSUME_O_CLOEXEC): Define unconditionally.
(__ASSUME_PSELECT): Do not undefine conditionally.
(__ASSUME_PPOLL): Likewise.
(__ASSUME_ATFCTS): Likewise.
(__ASSUME_SET_ROBUST_LIST): Likewise.
(__ASSUME_UTIMENSAT): Likewise.
(__ASSUME_FDATASYNC): Define unconditionally.
* sysdeps/unix/sysv/linux/arm/kernel-features.h
(__ASSUME_SIGFRAME_V2): Likewise.
)__ASSUME_EVENTFD2): Likewise.
(__ASSUME_SIGNALFD4): Likewise.
(__ASSUME_PSELECT): Do not undefine conditionally.
(__ASSUME_PPOLL): Likewise.
* sysdeps/unix/sysv/linux/ia64/kernel-features.h
(__ASSUME_PSELECT): Define unconditionally.
(__ASSUME_PPOLL): Likewise.
(__ASSUME_O_CLOEXEC): Likewise.
(__ASSUME_SOCK_CLOEXEC): Likewise.
(__ASSUME_IN_NONBLOCK): Likewise.
(__ASSUME_PIPE2): Likewise.
(__ASSUME_EVENTFD2): Likewise.
(__ASSUME_SIGNALFD4): Likewise.
(__ASSUME_DUP3): Likewise.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_O_CLOEXEC): Likewise.
(__ASSUME_SOCK_CLOEXEC): Likewise.
(__ASSUME_IN_NONBLOCK): Likewise.
(__ASSUME_PIPE2): Likewise.
(__ASSUME_EVENTFD2): Likewise.
(__ASSUME_SIGNALFD4): Likewise.
(__ASSUME_DUP3): Likewise.
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_EVENTFD2): Likewise.
(__ASSUME_SIGNALFD4): Likewise.
(__ASSUME_ACCEPT4_SYSCALL): Likewise.
2014-05-12 Andreas Schwab <schwab@suse.de> 2014-05-12 Andreas Schwab <schwab@suse.de>
[BZ #16932] [BZ #16932]

30
sysdeps/unix/sysv/linux/alpha/kernel-features.h
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@ -23,9 +23,7 @@
#define __ASSUME_UTIMES 1 #define __ASSUME_UTIMES 1
/* Support for the O_CLOEXEC flag was added for alpha in 2.6.23. */ /* Support for the O_CLOEXEC flag was added for alpha in 2.6.23. */
#if __LINUX_KERNEL_VERSION >= 0x020617 #define __ASSUME_O_CLOEXEC 1
# define __ASSUME_O_CLOEXEC 1
#endif
/* Support for various CLOEXEC and NONBLOCK flags was added for alpha after /* Support for various CLOEXEC and NONBLOCK flags was added for alpha after
2.6.33-rc1. */ 2.6.33-rc1. */
@ -57,28 +55,6 @@
#undef __ASSUME_ST_INO_64_BIT #undef __ASSUME_ST_INO_64_BIT
/* pselect/ppoll were introduced on alpha just after 2.6.22-rc1. */
#if __LINUX_KERNEL_VERSION < 0x020617
# undef __ASSUME_PSELECT
# undef __ASSUME_PPOLL
#endif
/* The *at syscalls were introduced on alpha just after 2.6.22-rc1. */
#if __LINUX_KERNEL_VERSION < 0x020617
# undef __ASSUME_ATFCTS
#endif
/* Support for inter-process robust mutexes was added on alpha just
after 2.6.22-rc1. */
#if __LINUX_KERNEL_VERSION < 0x020617
# undef __ASSUME_SET_ROBUST_LIST
#endif
/* Support for utimensat was added on alpha after 2.6.22-rc1. */
#if __LINUX_KERNEL_VERSION < 0x020617
# undef __ASSUME_UTIMENSAT
#endif
/* Support for fallocate was added for alpha after 2.6.33-rc1. */ /* Support for fallocate was added for alpha after 2.6.33-rc1. */
#if __LINUX_KERNEL_VERSION < 0x020621 #if __LINUX_KERNEL_VERSION < 0x020621
# undef __ASSUME_FALLOCATE # undef __ASSUME_FALLOCATE
@ -89,9 +65,7 @@
#define __ASSUME_STATFS64 0 #define __ASSUME_STATFS64 0
/* Support for fsyncdata was added for alpha after 2.6.21. */ /* Support for fsyncdata was added for alpha after 2.6.21. */
#if __LINUX_KERNEL_VERSION >= 0x020616 #define __ASSUME_FDATASYNC 1
# define __ASSUME_FDATASYNC 1
#endif
/* Support for preadv and pwritev was added for alpha in 2.6.33. */ /* Support for preadv and pwritev was added for alpha in 2.6.33. */
#if __LINUX_KERNEL_VERSION < 0x020621 #if __LINUX_KERNEL_VERSION < 0x020621

16
sysdeps/unix/sysv/linux/arm/kernel-features.h
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@ -21,15 +21,11 @@
#define __ASSUME_UTIMES 1 #define __ASSUME_UTIMES 1
/* The signal frame layout changed in 2.6.18. */ /* The signal frame layout changed in 2.6.18. */
#if __LINUX_KERNEL_VERSION >= 132626 #define __ASSUME_SIGFRAME_V2 1
# define __ASSUME_SIGFRAME_V2 1
#endif
/* Support for the eventfd2 and signalfd4 syscalls was added in 2.6.27. */ /* Support for the eventfd2 and signalfd4 syscalls was added in 2.6.27. */
#if __LINUX_KERNEL_VERSION >= 0x02061b #define __ASSUME_EVENTFD2 1
# define __ASSUME_EVENTFD2 1 #define __ASSUME_SIGNALFD4 1
# define __ASSUME_SIGNALFD4 1
#endif
/* Support for the recvmmsg syscall was added in 2.6.33. */ /* Support for the recvmmsg syscall was added in 2.6.33. */
#if __LINUX_KERNEL_VERSION >= 0x020621 #if __LINUX_KERNEL_VERSION >= 0x020621
@ -48,12 +44,6 @@
#include_next <kernel-features.h> #include_next <kernel-features.h>
/* Support for pselect6, ppoll and epoll_pwait was added in 2.6.32. */
#if __LINUX_KERNEL_VERSION < 0x020620
# undef __ASSUME_PSELECT
# undef __ASSUME_PPOLL
#endif
/* The ARM kernel may or may not support /* The ARM kernel may or may not support
futex_atomic_cmpxchg_inatomic, depending on kernel futex_atomic_cmpxchg_inatomic, depending on kernel
configuration. */ configuration. */

28
sysdeps/unix/sysv/linux/ia64/kernel-features.h
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@ -24,28 +24,20 @@
forever. */ forever. */
#define __ASSUME_UTIMES 1 #define __ASSUME_UTIMES 1
/* pselect/ppoll were introduced just after 2.6.16-rc1. Due to the way /* pselect/ppoll were introduced just after 2.6.16-rc1. */
the kernel versions are advertised we can only rely on 2.6.17 to have #define __ASSUME_PSELECT 1
the code. */ #define __ASSUME_PPOLL 1
#if __LINUX_KERNEL_VERSION >= 0x020616
# define __ASSUME_PSELECT 1
# define __ASSUME_PPOLL 1
#endif
/* Support for various CLOEXEC and NONBLOCK flags was added in 2.6.23. */ /* Support for various CLOEXEC and NONBLOCK flags was added in 2.6.23. */
#if __LINUX_KERNEL_VERSION >= 0x020617 #define __ASSUME_O_CLOEXEC 1
# define __ASSUME_O_CLOEXEC 1
#endif
/* Support for various CLOEXEC and NONBLOCK flags was added in 2.6.27. */ /* Support for various CLOEXEC and NONBLOCK flags was added in 2.6.27. */
#if __LINUX_KERNEL_VERSION >= 0x02061b #define __ASSUME_SOCK_CLOEXEC 1
# define __ASSUME_SOCK_CLOEXEC 1 #define __ASSUME_IN_NONBLOCK 1
# define __ASSUME_IN_NONBLOCK 1 #define __ASSUME_PIPE2 1
# define __ASSUME_PIPE2 1 #define __ASSUME_EVENTFD2 1
# define __ASSUME_EVENTFD2 1 #define __ASSUME_SIGNALFD4 1
# define __ASSUME_SIGNALFD4 1 #define __ASSUME_DUP3 1
# define __ASSUME_DUP3 1
#endif
/* Support for the recvmmsg syscall was added in 2.6.33. */ /* Support for the recvmmsg syscall was added in 2.6.33. */
#if __LINUX_KERNEL_VERSION >= 0x020621 #if __LINUX_KERNEL_VERSION >= 0x020621

104
sysdeps/unix/sysv/linux/kernel-features.h
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@ -81,98 +81,62 @@
|| defined __x86_64__ \ || defined __x86_64__ \
|| defined __powerpc__ \ || defined __powerpc__ \
|| defined __sh__ \ || defined __sh__ \
|| (defined __s390__ && __LINUX_KERNEL_VERSION >= 0x020616) || defined __s390__
# define __ASSUME_UTIMES 1 # define __ASSUME_UTIMES 1
#endif #endif
/* pselect/ppoll were introduced just after 2.6.16-rc1. Due to the way /* pselect/ppoll were introduced just after 2.6.16-rc1. On x86_64 and
the kernel versions are advertised we can only rely on 2.6.17 to have SH this appeared first in 2.6.19-rc1, on ia64 in 2.6.22-rc1. */
the code. On x86_64 and SH this appeared first in 2.6.19-rc1, #define __ASSUME_PSELECT 1
on ia64 in 2.6.22-rc1. */ #define __ASSUME_PPOLL 1
#if __LINUX_KERNEL_VERSION >= 0x020611 \
&& ((!defined __x86_64__ && !defined __sh__) \
|| (__LINUX_KERNEL_VERSION >= 0x020613 \
&& (defined __x86_64__ || defined __sh__)))
# define __ASSUME_PSELECT 1
# define __ASSUME_PPOLL 1
#endif
/* The *at syscalls were introduced just after 2.6.16-rc1. Due to the way the /* The *at syscalls were introduced just after 2.6.16-rc1. On PPC
kernel versions are advertised we can only rely on 2.6.17 to have they were introduced in 2.6.17-rc1, on SH in 2.6.19-rc1. */
the code. On PPC they were introduced in 2.6.17-rc1, #define __ASSUME_ATFCTS 1
on SH in 2.6.19-rc1. */
#if __LINUX_KERNEL_VERSION >= 0x020611 \
&& (!defined __sh__ || __LINUX_KERNEL_VERSION >= 0x020613)
# define __ASSUME_ATFCTS 1
#endif
/* Support for inter-process robust mutexes was added in 2.6.17 (but /* Support for inter-process robust mutexes was added in 2.6.17 (but
some architectures lack futex_atomic_cmpxchg_inatomic in some some architectures lack futex_atomic_cmpxchg_inatomic in some
configurations). */ configurations). */
#if __LINUX_KERNEL_VERSION >= 0x020611 \ #if !(defined __sparc__ && !defined __arch64__ && !defined __sparc_v9__)
&& (!defined __sh__ || __LINUX_KERNEL_VERSION >= 0x020613) \
&& !(defined __sparc__ && !defined __arch64__ && !defined __sparc_v9__)
# define __ASSUME_SET_ROBUST_LIST 1 # define __ASSUME_SET_ROBUST_LIST 1
#endif #endif
/* Pessimistically assume that 2.6.18 introduced real handling of /* Pessimistically assume that 2.6.18 introduced real handling of
large numbers of requests to readv and writev and that we don't large numbers of requests to readv and writev and that we don't
need a fallback. It likely worked for much longer. */ need a fallback. It likely worked for much longer. */
#if __LINUX_KERNEL_VERSION >= 0x020612 #define __ASSUME_COMPLETE_READV_WRITEV 1
# define __ASSUME_COMPLETE_READV_WRITEV 1
#endif
/* Support for PI futexes was added in 2.6.18 (but some architectures /* Support for PI futexes was added in 2.6.18 (but some architectures
lack futex_atomic_cmpxchg_inatomic in some configurations). */ lack futex_atomic_cmpxchg_inatomic in some configurations). */
#if __LINUX_KERNEL_VERSION >= 0x020612 \ #if !(defined __sparc__ && !defined __arch64__ && !defined __sparc_v9__)
&& !(defined __sparc__ && !defined __arch64__ && !defined __sparc_v9__)
# define __ASSUME_FUTEX_LOCK_PI 1 # define __ASSUME_FUTEX_LOCK_PI 1
#endif #endif
/* Support for utimensat syscall was added in 2.6.22, on SH /* Support for utimensat syscall was added in 2.6.22, on SH
only after 2.6.22-rc1. */ only after 2.6.22-rc1. */
#if __LINUX_KERNEL_VERSION >= 0x020616 \ #define __ASSUME_UTIMENSAT 1
&& (!defined __sh__ || __LINUX_KERNEL_VERSION >= 0x020617)
# define __ASSUME_UTIMENSAT 1
#endif
/* Support for private futexes was added in 2.6.22. */ /* Support for private futexes was added in 2.6.22. */
#if __LINUX_KERNEL_VERSION >= 0x020616 #define __ASSUME_PRIVATE_FUTEX 1
# define __ASSUME_PRIVATE_FUTEX 1
#endif
/* Support for fallocate was added in 2.6.23, on s390 /* Support for fallocate was added in 2.6.23, on s390
only after 2.6.23-rc1. */ only after 2.6.23-rc1. */
#if __LINUX_KERNEL_VERSION >= 0x020617 \ #define __ASSUME_FALLOCATE 1
&& (!defined __s390__ || __LINUX_KERNEL_VERSION >= 0x020618)
# define __ASSUME_FALLOCATE 1
#endif
/* Support for various CLOEXEC and NONBLOCK flags was added for x86, /* Support for various CLOEXEC and NONBLOCK flags was added for x86,
x86-64, PPC, IA-64, SPARC< and S390 in 2.6.23. */ x86-64, PPC, IA-64, SPARC< and S390 in 2.6.23. */
#if __LINUX_KERNEL_VERSION >= 0x020617 \ #if (defined __i386__ || defined __x86_64__ || defined __powerpc__ \
&& (defined __i386__ || defined __x86_64__ || defined __powerpc__ \ || defined __sparc__ || defined __s390__)
|| defined __sparc__ || defined __s390__)
# define __ASSUME_O_CLOEXEC 1 # define __ASSUME_O_CLOEXEC 1
#endif #endif
/* From 2.6.23 onwards the value of ARG_MAX depends on the stack
size. */
#define __LINUX_ARG_MAX_STACK_BASED_MIN_KERNEL 0x020617
#if __LINUX_KERNEL_VERSION >= __LINUX_ARG_MAX_STACK_BASED_MIN_KERNEL
# define __ASSUME_ARG_MAX_STACK_BASED 1
#endif
/* Support for ADJ_OFFSET_SS_READ was added in 2.6.24. */ /* Support for ADJ_OFFSET_SS_READ was added in 2.6.24. */
#if __LINUX_KERNEL_VERSION >= 0x020618 #define __ASSUME_ADJ_OFFSET_SS_READ 1
# define __ASSUME_ADJ_OFFSET_SS_READ 1
#endif
/* Support for various CLOEXEC and NONBLOCK flags was added for x86, /* Support for various CLOEXEC and NONBLOCK flags was added for x86,
x86-64, PPC, IA-64, and SPARC in 2.6.27. */ x86-64, PPC, IA-64, and SPARC in 2.6.27. */
#if __LINUX_KERNEL_VERSION >= 0x02061b \ #if (defined __i386__ || defined __x86_64__ || defined __powerpc__ \
&& (defined __i386__ || defined __x86_64__ || defined __powerpc__ \ || defined __sparc__ || defined __s390__)
|| defined __sparc__ || defined __s390__)
# define __ASSUME_SOCK_CLOEXEC 1 # define __ASSUME_SOCK_CLOEXEC 1
# define __ASSUME_IN_NONBLOCK 1 # define __ASSUME_IN_NONBLOCK 1
# define __ASSUME_PIPE2 1 # define __ASSUME_PIPE2 1
@ -192,14 +156,13 @@
available through a separate syscall at the same time as through available through a separate syscall at the same time as through
socketcall, and __ASSUME_ACCEPT4 if the accept4 function is known socketcall, and __ASSUME_ACCEPT4 if the accept4 function is known
to work. */ to work. */
#if __LINUX_KERNEL_VERSION >= 0x02061c && defined __ASSUME_SOCKETCALL #ifdef __ASSUME_SOCKETCALL
# define __ASSUME_ACCEPT4_SOCKETCALL 1 # define __ASSUME_ACCEPT4_SOCKETCALL 1
#endif #endif
/* The accept4 syscall was added for x86_64 and SPARC in 2.6.28, and /* The accept4 syscall was added for x86_64 and SPARC in 2.6.28, and
for PowerPC and SH in 2.6.37. */ for PowerPC and SH in 2.6.37. */
#if (__LINUX_KERNEL_VERSION >= 0x02061c \ #if (defined __x86_64__ || defined __sparc__) \
&& (defined __x86_64__ || defined __sparc__)) \
|| (__LINUX_KERNEL_VERSION >= 0x020625 \ || (__LINUX_KERNEL_VERSION >= 0x020625 \
&& (defined __powerpc__ || defined __sh__)) && (defined __powerpc__ || defined __sh__))
# define __ASSUME_ACCEPT4_SYSCALL 1 # define __ASSUME_ACCEPT4_SYSCALL 1
@ -213,33 +176,24 @@
#endif #endif
/* Support for the FUTEX_CLOCK_REALTIME flag was added in 2.6.29. */ /* Support for the FUTEX_CLOCK_REALTIME flag was added in 2.6.29. */
#if __LINUX_KERNEL_VERSION >= 0x02061d #define __ASSUME_FUTEX_CLOCK_REALTIME 1
# define __ASSUME_FUTEX_CLOCK_REALTIME 1
#endif
/* Support for the AT_RANDOM auxiliary vector entry was added in 2.6.29. */ /* Support for the AT_RANDOM auxiliary vector entry was added in 2.6.29. */
#if __LINUX_KERNEL_VERSION >= 0x02061d #define __ASSUME_AT_RANDOM 1
# define __ASSUME_AT_RANDOM 1
#endif
/* Support for preadv and pwritev was added in 2.6.30. */ /* Support for preadv and pwritev was added in 2.6.30. */
#if __LINUX_KERNEL_VERSION >= 0x02061e #define __ASSUME_PREADV 1
# define __ASSUME_PREADV 1 #define __ASSUME_PWRITEV 1
# define __ASSUME_PWRITEV 1
#endif
/* Support for FUTEX_*_REQUEUE_PI was added in 2.6.31 (but some /* Support for FUTEX_*_REQUEUE_PI was added in 2.6.31 (but some
architectures lack futex_atomic_cmpxchg_inatomic in some architectures lack futex_atomic_cmpxchg_inatomic in some
configurations). */ configurations). */
#if __LINUX_KERNEL_VERSION >= 0x02061f \ #if !(defined __sparc__ && !defined __arch64__ && !defined __sparc_v9__)
&& !(defined __sparc__ && !defined __arch64__ && !defined __sparc_v9__)
# define __ASSUME_REQUEUE_PI 1 # define __ASSUME_REQUEUE_PI 1
#endif #endif
/* Support for F_GETOWN_EX was introduced in 2.6.32. */ /* Support for F_GETOWN_EX was introduced in 2.6.32. */
#if __LINUX_KERNEL_VERSION >= 0x020620 #define __ASSUME_F_GETOWN_EX 1
# define __ASSUME_F_GETOWN_EX 1
#endif
/* Support for recvmmsg functionality was added in 2.6.33. The macros /* Support for recvmmsg functionality was added in 2.6.33. The macros
defined correspond to those for accept4. */ defined correspond to those for accept4. */
@ -308,6 +262,4 @@
/* 2.6.29 removed the XFS restricted_chown sysctl, so it is pointless looking /* 2.6.29 removed the XFS restricted_chown sysctl, so it is pointless looking
for it in newer kernels. */ for it in newer kernels. */
#if __LINUX_KERNEL_VERSION >= 0x02061d #define __ASSUME_XFS_RESTRICTED_CHOWN 1
# define __ASSUME_XFS_RESTRICTED_CHOWN 1
#endif

18
sysdeps/unix/sysv/linux/m68k/kernel-features.h
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@ -24,19 +24,15 @@
#define __ASSUME_UTIMES 1 #define __ASSUME_UTIMES 1
/* Support for various CLOEXEC and NONBLOCK flags was added 2.6.23. */ /* Support for various CLOEXEC and NONBLOCK flags was added 2.6.23. */
#if __LINUX_KERNEL_VERSION >= 0x020617 #define __ASSUME_O_CLOEXEC 1
# define __ASSUME_O_CLOEXEC 1
#endif
/* Support for various CLOEXEC and NONBLOCK flags was added in 2.6.27. */ /* Support for various CLOEXEC and NONBLOCK flags was added in 2.6.27. */
#if __LINUX_KERNEL_VERSION >= 0x02061b #define __ASSUME_SOCK_CLOEXEC 1
# define __ASSUME_SOCK_CLOEXEC 1 #define __ASSUME_IN_NONBLOCK 1
# define __ASSUME_IN_NONBLOCK 1 #define __ASSUME_PIPE2 1
# define __ASSUME_PIPE2 1 #define __ASSUME_EVENTFD2 1
# define __ASSUME_EVENTFD2 1 #define __ASSUME_SIGNALFD4 1
# define __ASSUME_SIGNALFD4 1 #define __ASSUME_DUP3 1
# define __ASSUME_DUP3 1
#endif
#include_next <kernel-features.h> #include_next <kernel-features.h>

10
sysdeps/unix/sysv/linux/mips/kernel-features.h
View File

@ -26,15 +26,11 @@
#define __ASSUME_UTIMES 1 #define __ASSUME_UTIMES 1
/* Support for the eventfd2 and signalfd4 syscalls was added in 2.6.27. */ /* Support for the eventfd2 and signalfd4 syscalls was added in 2.6.27. */
#if __LINUX_KERNEL_VERSION >= 0x02061c #define __ASSUME_EVENTFD2 1
# define __ASSUME_EVENTFD2 1 #define __ASSUME_SIGNALFD4 1
# define __ASSUME_SIGNALFD4 1
#endif
/* Support for the accept4 syscall was added in 2.6.31. */ /* Support for the accept4 syscall was added in 2.6.31. */
#if __LINUX_KERNEL_VERSION >= 0x02061f #define __ASSUME_ACCEPT4_SYSCALL 1
# define __ASSUME_ACCEPT4_SYSCALL 1
#endif
/* Support for the recvmmsg syscall was added in 2.6.33. */ /* Support for the recvmmsg syscall was added in 2.6.33. */
#if __LINUX_KERNEL_VERSION >= 0x020621 #if __LINUX_KERNEL_VERSION >= 0x020621

12
sysdeps/unix/sysv/linux/sysconf.c
View File

@ -88,15 +88,9 @@ __sysconf (int name)
return HAS_CPUCLOCK (name); return HAS_CPUCLOCK (name);
case _SC_ARG_MAX: case _SC_ARG_MAX:
#if !__ASSUME_ARG_MAX_STACK_BASED /* Use getrlimit to get the stack limit. */
/* Determine whether this is a kernel with an argument limit if (__getrlimit (RLIMIT_STACK, &rlimit) == 0)
determined by the stack size. */ return MAX (legacy_ARG_MAX, rlimit.rlim_cur / 4);
if (GLRO(dl_discover_osversion) ()
>= __LINUX_ARG_MAX_STACK_BASED_MIN_KERNEL)
#endif
/* Use getrlimit to get the stack limit. */
if (__getrlimit (RLIMIT_STACK, &rlimit) == 0)
return MAX (legacy_ARG_MAX, rlimit.rlim_cur / 4);
return legacy_ARG_MAX; return legacy_ARG_MAX;