Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 109ed16..f6efabc 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -62,6 +62,8 @@
struct ucontext rs_uc;
};
+#ifdef CONFIG_MIPS_FP_SUPPORT
+
/*
* Thread saved context copy to/from a signal context presumed to be on the
* user stack, and therefore accessed with appropriate macros from uaccess.h.
@@ -104,6 +106,20 @@
return err;
}
+#else /* !CONFIG_MIPS_FP_SUPPORT */
+
+static int copy_fp_to_sigcontext(void __user *sc)
+{
+ return 0;
+}
+
+static int copy_fp_from_sigcontext(void __user *sc)
+{
+ return 0;
+}
+
+#endif /* !CONFIG_MIPS_FP_SUPPORT */
+
/*
* Wrappers for the assembly _{save,restore}_fp_context functions.
*/
@@ -142,6 +158,8 @@
return &uc->uc_extcontext;
}
+#ifdef CONFIG_CPU_HAS_MSA
+
static int save_msa_extcontext(void __user *buf)
{
struct msa_extcontext __user *msa = buf;
@@ -195,9 +213,6 @@
unsigned int csr;
int i, err;
- if (!IS_ENABLED(CONFIG_CPU_HAS_MSA))
- return SIGSYS;
-
if (size != sizeof(*msa))
return -EINVAL;
@@ -234,6 +249,20 @@
return err;
}
+#else /* !CONFIG_CPU_HAS_MSA */
+
+static int save_msa_extcontext(void __user *buf)
+{
+ return 0;
+}
+
+static int restore_msa_extcontext(void __user *buf, unsigned int size)
+{
+ return SIGSYS;
+}
+
+#endif /* !CONFIG_CPU_HAS_MSA */
+
static int save_extcontext(void __user *buf)
{
int sz;
@@ -561,7 +590,7 @@
if (act) {
old_sigset_t mask;
- if (!access_ok(VERIFY_READ, act, sizeof(*act)))
+ if (!access_ok(act, sizeof(*act)))
return -EFAULT;
err |= __get_user(new_ka.sa.sa_handler, &act->sa_handler);
err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
@@ -575,7 +604,7 @@
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
- if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
+ if (!access_ok(oact, sizeof(*oact)))
return -EFAULT;
err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
err |= __put_user(old_ka.sa.sa_handler, &oact->sa_handler);
@@ -601,7 +630,7 @@
regs = current_pt_regs();
frame = (struct sigframe __user *)regs->regs[29];
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ if (!access_ok(frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&blocked, &frame->sf_mask, sizeof(blocked)))
goto badframe;
@@ -612,7 +641,7 @@
if (sig < 0)
goto badframe;
else if (sig)
- force_sig(sig, current);
+ force_sig(sig);
/*
* Don't let your children do this ...
@@ -625,7 +654,7 @@
/* Unreached */
badframe:
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
}
#endif /* CONFIG_TRAD_SIGNALS */
@@ -638,7 +667,7 @@
regs = current_pt_regs();
frame = (struct rt_sigframe __user *)regs->regs[29];
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ if (!access_ok(frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set)))
goto badframe;
@@ -649,7 +678,7 @@
if (sig < 0)
goto badframe;
else if (sig)
- force_sig(sig, current);
+ force_sig(sig);
if (restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
@@ -665,7 +694,7 @@
/* Unreached */
badframe:
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
}
#ifdef CONFIG_TRAD_SIGNALS
@@ -676,7 +705,7 @@
int err = 0;
frame = get_sigframe(ksig, regs, sizeof(*frame));
- if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ if (!access_ok(frame, sizeof (*frame)))
return -EFAULT;
err |= setup_sigcontext(regs, &frame->sf_sc);
@@ -715,7 +744,7 @@
int err = 0;
frame = get_sigframe(ksig, regs, sizeof(*frame));
- if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ if (!access_ok(frame, sizeof (*frame)))
return -EFAULT;
/* Create siginfo. */
@@ -880,7 +909,7 @@
user_enter();
}
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && defined(CONFIG_MIPS_FP_SUPPORT)
static int smp_save_fp_context(void __user *sc)
{
return raw_cpu_has_fpu
@@ -908,7 +937,7 @@
(offsetof(struct rt_sigframe, rs_uc.uc_extcontext) -
offsetof(struct rt_sigframe, rs_uc.uc_mcontext)));
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && defined(CONFIG_MIPS_FP_SUPPORT)
/* For now just do the cpu_has_fpu check when the functions are invoked */
save_fp_context = smp_save_fp_context;
restore_fp_context = smp_restore_fp_context;