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powerpc: Fix build by disabling attribute-alias warning for SYSCALL_DEFINEx

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GCC 8.1 emits warnings such as the following. As arch/powerpc code is
built with -Werror, this breaks the build with GCC 8.1.

  In file included from arch/powerpc/kernel/pci_64.c:23:
  ./include/linux/syscalls.h:233:18: error: 'sys_pciconfig_iobase' alias
  between functions of incompatible types 'long int(long int, long
  unsigned int, long unsigned int)' and 'long int(long int, long int,
  long int)' [-Werror=attribute-alias]
    asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
                    ^~~
  ./include/linux/syscalls.h:222:2: note: in expansion of macro '__SYSCALL_DEFINEx'
    __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)

This patch inhibits those warnings.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Trim change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2018-05-29 16:06:41 +00:00 committed by Michael Ellerman
parent c959988118
commit 2479bfc9bc
6 changed files with 28 additions and 0 deletions
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4
arch/powerpc/kernel/pci_64.c
View File

@ -203,6 +203,9 @@ void pcibios_setup_phb_io_space(struct pci_controller *hose)
#define IOBASE_ISA_IO 3
#define IOBASE_ISA_MEM 4
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Wattribute-alias"
SYSCALL_DEFINE3(pciconfig_iobase, long, which, unsigned long, in_bus,
unsigned long, in_devfn)
{
@ -256,6 +259,7 @@ SYSCALL_DEFINE3(pciconfig_iobase, long, which, unsigned long, in_bus,
return -EOPNOTSUPP;
}
#pragma GCC diagnostic pop
#ifdef CONFIG_NUMA
int pcibus_to_node(struct pci_bus *bus)

4
arch/powerpc/kernel/rtas.c
View File

@ -1051,6 +1051,9 @@ struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
}
/* We assume to be passed big endian arguments */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Wattribute-alias"
SYSCALL_DEFINE1(rtas, struct rtas_args __user *, uargs)
{
struct rtas_args args;
@ -1137,6 +1140,7 @@ SYSCALL_DEFINE1(rtas, struct rtas_args __user *, uargs)
return 0;
}
#pragma GCC diagnostic pop
/*
* Call early during boot, before mem init, to retrieve the RTAS

8
arch/powerpc/kernel/signal_32.c
View File

@ -1037,6 +1037,9 @@ static int do_setcontext_tm(struct ucontext __user *ucp,
}
#endif
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Wattribute-alias"
#ifdef CONFIG_PPC64
COMPAT_SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx,
struct ucontext __user *, new_ctx, int, ctx_size)
@ -1132,6 +1135,7 @@ SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx,
set_thread_flag(TIF_RESTOREALL);
return 0;
}
#pragma GCC diagnostic pop
#ifdef CONFIG_PPC64
COMPAT_SYSCALL_DEFINE0(rt_sigreturn)
@ -1228,6 +1232,9 @@ SYSCALL_DEFINE0(rt_sigreturn)
return 0;
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Wattribute-alias"
#ifdef CONFIG_PPC32
SYSCALL_DEFINE3(debug_setcontext, struct ucontext __user *, ctx,
int, ndbg, struct sig_dbg_op __user *, dbg)
@ -1333,6 +1340,7 @@ SYSCALL_DEFINE3(debug_setcontext, struct ucontext __user *, ctx,
return 0;
}
#endif
#pragma GCC diagnostic pop
/*
* OK, we're invoking a handler

4
arch/powerpc/kernel/signal_64.c
View File

@ -625,6 +625,9 @@ static long setup_trampoline(unsigned int syscall, unsigned int __user *tramp)
/*
* Handle {get,set,swap}_context operations
*/
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Wattribute-alias"
SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx,
struct ucontext __user *, new_ctx, long, ctx_size)
{
@ -690,6 +693,7 @@ SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx,
set_thread_flag(TIF_RESTOREALL);
return 0;
}
#pragma GCC diagnostic pop
/*

4
arch/powerpc/kernel/syscalls.c
View File

@ -62,6 +62,9 @@ out:
return ret;
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Wattribute-alias"
SYSCALL_DEFINE6(mmap2, unsigned long, addr, size_t, len,
unsigned long, prot, unsigned long, flags,
unsigned long, fd, unsigned long, pgoff)
@ -75,6 +78,7 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, size_t, len,
{
return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);
}
#pragma GCC diagnostic pop
#ifdef CONFIG_PPC32
/*

4
arch/powerpc/mm/subpage-prot.c
View File

@ -186,6 +186,9 @@ static void subpage_mark_vma_nohuge(struct mm_struct *mm, unsigned long addr,
* in a 2-bit field won't allow writes to a page that is otherwise
* write-protected.
*/
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Wattribute-alias"
SYSCALL_DEFINE3(subpage_prot, unsigned long, addr,
unsigned long, len, u32 __user *, map)
{
@ -269,3 +272,4 @@ SYSCALL_DEFINE3(subpage_prot, unsigned long, addr,
up_write(&mm->mmap_sem);
return err;
}
#pragma GCC diagnostic pop