x86: ia32_signal: introduce COPY_SEG_CPL3

Impact: cleanup

Introduce COPY_SEG_CPL3 for ia32_restore_sigcontext().

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 8 insertions, 4 deletions

diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index 610a17774ea2..fe44c314c9c0 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -201,6 +201,12 @@ struct rt_sigframe
         err |= __get_user(regs->x, &sc->x);     \
 }
 
+#define COPY_SEG_CPL3(seg)      {                       \
+                unsigned short tmp;                     \
+                err |= __get_user(tmp, &sc->seg);       \
+                regs->seg = tmp | 3;                    \
+}
+
 #define RELOAD_SEG(seg,mask)                                            \
         { unsigned int cur;                                             \
           unsigned short pre;                                           \
@@ -246,10 +252,8 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
         COPY(dx); COPY(cx); COPY(ip);
         /* Don't touch extended registers */
 
-        err |= __get_user(regs->cs, &sc->cs);
-        regs->cs |= 3;
-        err |= __get_user(regs->ss, &sc->ss);
-        regs->ss |= 3;
+        COPY_SEG_CPL3(cs);
+        COPY_SEG_CPL3(ss);
 
         err |= __get_user(tmpflags, &sc->flags);
         regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);