diff options
| author | Andy Lutomirski <luto@kernel.org> | 2016-01-31 18:33:28 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-02-01 08:53:25 +0100 |
| commit | bb56968a37a44070de92d5690c4b08dd98a5d3f1 (patch) | |
| tree | 88185bd29a5e666ee77e72f7406cd716eb11ef09 /arch/x86/entry/syscalls | |
| parent | x86/entry/64: Fix fast-path syscall return register state (diff) | |
| download | linux-bb56968a37a44070de92d5690c4b08dd98a5d3f1.tar.xz linux-bb56968a37a44070de92d5690c4b08dd98a5d3f1.zip | |
x86/syscalls/64: Mark sys_iopl() as using ptregs
sys_iopl() both reads and writes pt_regs->flags. Mark it as using ptregs.
This isn't strictly necessary, as pt_regs->flags is available
even in the fast path, but this is very lightweight now that we
have syscall qualifiers and it could avoid some pain down the
road.
Reported-and-tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/3de0ca692fa8bf414c5e3d7afe3e6195d1a10e1f.1454261517.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/entry/syscalls')
| -rw-r--r-- | arch/x86/entry/syscalls/syscall_64.tbl | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index dcf107ce2cd4..2e5b565adacc 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -178,7 +178,7 @@ 169 common reboot sys_reboot 170 common sethostname sys_sethostname 171 common setdomainname sys_setdomainname -172 common iopl sys_iopl +172 common iopl sys_iopl/ptregs 173 common ioperm sys_ioperm 174 64 create_module 175 common init_module sys_init_module |