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Assume prlimit64 is available.

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This patch makes sysdeps/unix/sysv/linux code assume the prlimit64
syscall is always available, given the minimum of a 3.2 kernel.

__ASSUME_PRLIMIT64, which in fact was no longer used, is removed.
Code conditional on __NR_prlimit64 being defined is made
unconditional.  Fallback code for the case where prlimit64 produces an
ENOSYS error is removed, substantially simplifying some functions.

Tested for x86_64 and x86.

	* sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_PRLIMIT64):
	Remove macro.
	* sysdeps/unix/sysv/linux/getrlimit64.c (__getrlimit64): Assume
	prlimit64 is always available and does not give an ENOSYS error.
	* sysdeps/unix/sysv/linux/prlimit.c [__NR_prlimit64]: Make code
	unconditional.
	[!__NR_prlimit64]: Remove conditional code.
	* sysdeps/unix/sysv/linux/setrlimit.c (__setrlimit): Assume
	prlimit64 is always available and does not give an ENOSYS error.
	* sysdeps/unix/sysv/linux/setrlimit64.c (__setrlimit64): Likewise.
This commit is contained in:
Joseph Myers
2017-05-09 14:05:09 +00:00
parent a972dc672c
commit 695d7d138e
6 changed files with 16 additions and 85 deletions
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10
sysdeps/unix/sysv/linux/prlimit.c
View File

@ -20,7 +20,6 @@
#include <sys/syscall.h>
#ifdef __NR_prlimit64
int
prlimit (__pid_t pid, enum __rlimit_resource resource,
const struct rlimit *new_rlimit, struct rlimit *old_rlimit)
@ -73,12 +72,3 @@ prlimit (__pid_t pid, enum __rlimit_resource resource,
return res;
}
#else
int
prlimit (__pid_t pid, enum __rlimit_resource resource,
const struct rlimit *new_rlimit, struct rlimit *old_rlimit)
{
return INLINE_SYSCALL_ERROR_RETURN_VALUE (ENOSYS);
}
stub_warning (prlimit)
#endif