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Date: Wed, 14 Mar 2018 06:48:02 +0100 From: Dominik Brodowski <linux@...inikbrodowski.net> To: Andy Lutomirski <luto@...capital.net>, "Tautschnig, Michael" <tautschn@...zon.co.uk> Cc: Jann Horn <jannh@...gle.com>, "x86@...nel.org" <x86@...nel.org>, "linux-api@...r.kernel.org" <linux-api@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, Jaswinder Singh <jaswinder@...radead.org>, Andi Kleen <ak@...ux.intel.com> Subject: Re: [PATCH] x86: always use SYSCALL_DEFINE* Michael, On Tue, Mar 13, 2018 at 11:18:08PM +0000, Andy Lutomirski wrote: > On Tue, Mar 13, 2018 at 9:16 PM, Jann Horn <jannh@...gle.com> wrote: > > On Sat, Mar 10, 2018 at 12:55 PM, Tautschnig, Michael > > <tautschn@...zon.co.uk> wrote: > >> All syscall arguments are passed in as types of the same byte size as > >> unsigned long (width of full registers). Using a smaller type without a > >> cast may result in losing bits of information. SYSCALL_DEFINE* introduce > >> adequate type casts. All definitions of syscalls in x86 except for those > >> patched here have already been using the appropriate SYSCALL_DEFINE*. > > [...] > >> diff --git a/arch/x86/kernel/ioport.c b/arch/x86/kernel/ioport.c > >> index 2f72330..d98b2a3 100644 > >> --- a/arch/x86/kernel/ioport.c > >> +++ b/arch/x86/kernel/ioport.c > >> @@ -23,7 +23,8 @@ > >> /* > >> * this changes the io permissions bitmap in the current task. > >> */ > >> -asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on) > >> +SYSCALL_DEFINE3(sys_ioperm, unsigned long, from, unsigned long, num, int, > >> + turn_on) > > > > Shouldn't this be "SYSCALL_DEFINE3(ioperm, [...]", without the "sys_"? > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-api" in > > the body of a message to majordomo@...r.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > I think this patch will be obsoleted by a series of patches from Dominik. ... the ioperm change is already in mainline (did an equivalent change a couple of days ago), but the sigreturn/rt_sigreturn changes still seem useful. Could you send a fresh patch with just these two changes; and -- if the x86 maintainers agree -- I will push it with my syscall-related changes? Thanks, Dominik
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