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c718a0bad7
There are some building warnings when building LoongArch kernel with W=1
as following, this patch fixes them.
arch/loongarch/kernel/acpi.c:284:13: warning: no previous prototype for ‘acpi_numa_arch_fixup’ [-Wmissing-prototypes]
284 | void __init acpi_numa_arch_fixup(void) {}
| ^~~~~~~~~~~~~~~~~~~~
arch/loongarch/kernel/time.c:32:13: warning: no previous prototype for ‘constant_timer_interrupt’ [-Wmissing-prototypes]
32 | irqreturn_t constant_timer_interrupt(int irq, void *data)
| ^~~~~~~~~~~~~~~~~~~~~~~~
arch/loongarch/kernel/traps.c:496:25: warning: no previous prototype for 'do_fpe' [-Wmissing-prototypes]
496 | asmlinkage void noinstr do_fpe(struct pt_regs *regs
| ^~~~~~
arch/loongarch/kernel/traps.c:813:22: warning: variable ‘opcode’ set but not used [-Wunused-but-set-variable]
813 | unsigned int opcode;
| ^~~~~~
arch/loongarch/kernel/signal.c:895:14: warning: no previous prototype for ‘get_sigframe’ [-Wmissing-prototypes]
895 | void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,
| ^~~~~~~~~~~~
arch/loongarch/kernel/syscall.c:21:40: warning: initialized field overwritten [-Woverride-init]
21 | #define __SYSCALL(nr, call) [nr] = (call),
| ^
arch/loongarch/kernel/syscall.c:40:14: warning: no previous prototype for ‘do_syscall’ [-Wmissing-prototypes]
40 | void noinstr do_syscall(struct pt_regs *regs)
| ^~~~~~~~~~
arch/loongarch/kernel/smp.c:502:17: warning: no previous prototype for ‘start_secondary’ [-Wmissing-prototypes]
502 | asmlinkage void start_secondary(void)
| ^~~~~~~~~~~~~~~
arch/loongarch/kernel/process.c:309:15: warning: no previous prototype for ‘arch_align_stack’ [-Wmissing-prototypes]
309 | unsigned long arch_align_stack(unsigned long sp)
| ^~~~~~~~~~~~~~~~
arch/loongarch/kernel/topology.c:13:5: warning: no previous prototype for ‘arch_register_cpu’ [-Wmissing-prototypes]
13 | int arch_register_cpu(int cpu)
| ^~~~~~~~~~~~~~~~~
arch/loongarch/kernel/topology.c:27:6: warning: no previous prototype for ‘arch_unregister_cpu’ [-Wmissing-prototypes]
27 | void arch_unregister_cpu(int cpu)
| ^~~~~~~~~~~~~~~~~~~
arch/loongarch/kernel/module-sections.c:103:5: warning: no previous prototype for ‘module_frob_arch_sections’ [-Wmissing-prototypes]
103 | int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/loongarch/mm/hugetlbpage.c:56:5: warning: no previous prototype for ‘is_aligned_hugepage_range’ [-Wmissing-prototypes]
56 | int is_aligned_hugepage_range(unsigned long addr, unsigned long len)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Author: Hanlu Li <lihanlu@loongson.cn>
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* Huacai Chen <chenhuacai@loongson.cn>
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*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#include <linux/capability.h>
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#include <linux/entry-common.h>
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#include <linux/errno.h>
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#include <linux/linkage.h>
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#include <linux/syscalls.h>
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#include <linux/unistd.h>
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#include <asm/asm.h>
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#include <asm/exception.h>
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#include <asm/signal.h>
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#include <asm/switch_to.h>
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#include <asm-generic/syscalls.h>
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#undef __SYSCALL
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#define __SYSCALL(nr, call) [nr] = (call),
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SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, unsigned long,
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prot, unsigned long, flags, unsigned long, fd, off_t, offset)
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{
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if (offset & ~PAGE_MASK)
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return -EINVAL;
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return ksys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
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}
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void *sys_call_table[__NR_syscalls] = {
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[0 ... __NR_syscalls - 1] = sys_ni_syscall,
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#include <asm/unistd.h>
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};
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typedef long (*sys_call_fn)(unsigned long, unsigned long,
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unsigned long, unsigned long, unsigned long, unsigned long);
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void noinstr do_syscall(struct pt_regs *regs)
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{
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unsigned long nr;
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sys_call_fn syscall_fn;
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nr = regs->regs[11];
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/* Set for syscall restarting */
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if (nr < NR_syscalls)
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regs->regs[0] = nr + 1;
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regs->csr_era += 4;
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regs->orig_a0 = regs->regs[4];
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regs->regs[4] = -ENOSYS;
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nr = syscall_enter_from_user_mode(regs, nr);
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if (nr < NR_syscalls) {
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syscall_fn = sys_call_table[nr];
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regs->regs[4] = syscall_fn(regs->orig_a0, regs->regs[5], regs->regs[6],
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regs->regs[7], regs->regs[8], regs->regs[9]);
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}
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syscall_exit_to_user_mode(regs);
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}
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