From 2479bfc9bc600dcce7f932d52dcfa8d677c41f93 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Tue, 29 May 2018 16:06:41 +0000 Subject: [PATCH] powerpc: Fix build by disabling attribute-alias warning for SYSCALL_DEFINEx 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 [mpe: Trim change log] Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/pci_64.c | 4 ++++ arch/powerpc/kernel/rtas.c | 4 ++++ arch/powerpc/kernel/signal_32.c | 8 ++++++++ arch/powerpc/kernel/signal_64.c | 4 ++++ arch/powerpc/kernel/syscalls.c | 4 ++++ arch/powerpc/mm/subpage-prot.c | 4 ++++ 6 files changed, 28 insertions(+) diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index dff28f903512..812171c09f42 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -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) diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index 8afd146bc9c7..7fb9f83dcde8 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -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 diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index 9cf8a03d3bc7..342ac78f620f 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -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 diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c index 83d51bf586c7..d42b60020389 100644 --- a/arch/powerpc/kernel/signal_64.c +++ b/arch/powerpc/kernel/signal_64.c @@ -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 /* diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c index 466216506eb2..083fa06962fd 100644 --- a/arch/powerpc/kernel/syscalls.c +++ b/arch/powerpc/kernel/syscalls.c @@ -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 /* diff --git a/arch/powerpc/mm/subpage-prot.c b/arch/powerpc/mm/subpage-prot.c index 9d16ee251fc0..75cb646a79c3 100644 --- a/arch/powerpc/mm/subpage-prot.c +++ b/arch/powerpc/mm/subpage-prot.c @@ -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