selftests: pidfd: Fix compling warnings - linux-dev - Linux kernel development work

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author	Li Zhijian <lizhijian@fujitsu.com>	2022-09-01 03:17:34 +0000
committer	Shuah Khan <skhan@linuxfoundation.org>	2022-10-30 02:23:58 -0600
commit	3d982441308ebdf713771c8a85c23d9b8b66b4d4 (patch)
tree	3ca6506dc27c4f9cd0c15693b46444692d097c1c /drivers/net/ethernet/atheros/git:/ssh:/git@git.zx2c4.com
parent	ksefltests: pidfd: Fix wait_states: Test terminated by timeout (diff)

selftests: pidfd: Fix compling warnings

Fix warnings and enable Wall. pidfd_wait.c: In function ‘wait_nonblock’: pidfd_wait.c:150:13: warning: unused variable ‘status’ [-Wunused-variable] 150 | int pidfd, status = 0; | ^~~~~~ ... pidfd_test.c: In function ‘child_poll_exec_test’: pidfd_test.c:438:1: warning: no return statement in function returning non-void [-Wreturn-type] 438 | } | ^ Signed-off-by: Li Zhijian <lizhijian@fujitsu.com> v2: fix mistake assignment to pidfd Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

Diffstat (limited to 'drivers/net/ethernet/atheros/git:/ssh:/git@git.zx2c4.com')

0 files changed, 0 insertions, 0 deletions

/* Create new context. Copyright (C) 2008-2020 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by David S. Miller <davem@davemloft.net>, 2008. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #include <sysdep.h> #include <stdarg.h> #include <stdint.h> #include <ucontext.h> /* Sets up the outgoing arguments and the program counter for a user context for the requested function call. Returning to the correct parent context is pretty simple on Sparc. We only need to link up the register windows correctly. Since global registers are clobbered by calls, we need not be concerned about those, and thus is all could be worked out without using a trampoline. Except that we must deal with the signal mask, thus a trampoline is unavoidable. 32-bit stackframe layout: +-----------------------------------------+ | 7th and further parameters | +-----------------------------------------+ | backup storage for initial 6 parameters | +-----------------------------------------+ | struct return pointer | +-----------------------------------------+ | 8 incoming registers | +-----------------------------------------+ | 8 local registers | %sp --> +-----------------------------------------+ */ void __makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...) { extern void __start_context (void); unsigned long int *sp; va_list ap; int i; sp = (unsigned long int *) (ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size); sp -= 16 + 7 + argc; sp = (unsigned long int *) (((uintptr_t) sp) & ~(8 - 1)); for (i = 0; i < 8; i++) sp[i + 8] = ucp->uc_mcontext.gregs[REG_O0 + i]; /* The struct return pointer is essentially unused, so we can place the link there. */ sp[16] = (unsigned long int) ucp->uc_link; va_start (ap, argc); /* Fill in outgoing arguments, including those which will end up being passed on the stack. */ for (i = 0; i < argc; i++) { unsigned long int arg = va_arg (ap, unsigned long int); if (i < 6) ucp->uc_mcontext.gregs[REG_O0 + i] = arg; else sp[i + 23 - 6] = arg; } va_end (ap); ucp->uc_mcontext.gregs[REG_O6] = (unsigned long int) sp; ucp->uc_mcontext.gregs[REG_O7] = ((unsigned long int) __start_context) - 8; ucp->uc_mcontext.gregs[REG_PC] = (unsigned long int) func; ucp->uc_mcontext.gregs[REG_nPC] = ucp->uc_mcontext.gregs[REG_PC] + 4; } weak_alias (__makecontext, makecontext)


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