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Commit 7e8e385a authored by Brian Gerst's avatar Brian Gerst Committed by Ingo Molnar
Browse files

x86/compat: Remove sys32_vm86_warning 



The check against lastcomm is racy, and the message it produces
isn't necessary.  vm86 support can be disabled on a 32-bit
kernel also, and doesn't have this message.  Switch to
sys_ni_syscall instead.

Signed-off-by: default avatarBrian Gerst <brgerst@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1425439896-8322-4-git-send-email-brgerst@gmail.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 2aa4a710

arch/x86/ia32/sys_ia32.c

+0 −14
Original line number Diff line number Diff line
@@ -201,20 +201,6 @@ long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, 
				advice);

}



long sys32_vm86_warning(void)

{

	struct task_struct *me = current;

	static char lastcomm[sizeof(me->comm)];



	if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {

		compat_printk(KERN_INFO

			      "%s: vm86 mode not supported on 64 bit kernel\n",

			      me->comm);

		strncpy(lastcomm, me->comm, sizeof(lastcomm));

	}

	return -ENOSYS;

}



asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,

				   size_t count)

{

arch/x86/syscalls/syscall_32.tbl

+2 −2
Original line number Diff line number Diff line
@@ -119,7 +119,7 @@ 
110	i386	iopl			sys_iopl

111	i386	vhangup			sys_vhangup

112	i386	idle

113	i386	vm86old			sys_vm86old			sys32_vm86_warning

113	i386	vm86old			sys_vm86old			sys_ni_syscall

114	i386	wait4			sys_wait4			compat_sys_wait4

115	i386	swapoff			sys_swapoff

116	i386	sysinfo			sys_sysinfo			compat_sys_sysinfo
@@ -172,7 +172,7 @@ 
163	i386	mremap			sys_mremap

164	i386	setresuid		sys_setresuid16

165	i386	getresuid		sys_getresuid16

166	i386	vm86			sys_vm86			sys32_vm86_warning

166	i386	vm86			sys_vm86			sys_ni_syscall

167	i386	query_module

168	i386	poll			sys_poll

169	i386	nfsservctl