Merge remote-tracking branches 'regulator/topic/of', 'regulator/topic/pv88080', ...

[cascardo/linux.git] / arch / powerpc / kernel / signal_32.c

diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index b6aa378..a7daf74 100644 (file)
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -1226,7 +1226,21 @@ long sys_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
                (regs->gpr[1] + __SIGNAL_FRAMESIZE + 16);
        if (!access_ok(VERIFY_READ, rt_sf, sizeof(*rt_sf)))
                goto bad;
+
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+       /*
+        * If there is a transactional state then throw it away.
+        * The purpose of a sigreturn is to destroy all traces of the
+        * signal frame, this includes any transactional state created
+        * within in. We only check for suspended as we can never be
+        * active in the kernel, we are active, there is nothing better to
+        * do than go ahead and Bad Thing later.
+        * The cause is not important as there will never be a
+        * recheckpoint so it's not user visible.
+        */
+       if (MSR_TM_SUSPENDED(mfmsr()))
+               tm_reclaim_current(0);
+
        if (__get_user(tmp, &rt_sf->uc.uc_link))
                goto bad;
        uc_transact = (struct ucontext __user *)(uintptr_t)tmp;