microblaze: Add STATE_SAVE_ARG_SPACE for noMMU kernel too
For noMMU kernel this change nothing bring but this change
helps with MMU synchronization.
Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/arch/microblaze/include/asm/entry.h b/arch/microblaze/include/asm/entry.h
index 1019d88..e4c3aef 100644
--- a/arch/microblaze/include/asm/entry.h
+++ b/arch/microblaze/include/asm/entry.h
@@ -31,4 +31,7 @@
DECLARE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */
# endif /* __ASSEMBLY__ */
+/* noMMU hasn't any space for args */
+# define STATE_SAVE_ARG_SPACE (0)
+
#endif /* _ASM_MICROBLAZE_ENTRY_H */
diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index 89aa395..9329029 100644
--- a/arch/microblaze/include/asm/processor.h
+++ b/arch/microblaze/include/asm/processor.h
@@ -15,6 +15,8 @@
#include <asm/setup.h>
#include <asm/registers.h>
#include <asm/segment.h>
+#include <asm/entry.h>
+#include <asm/current.h>
# ifndef __ASSEMBLY__
/* from kernel/cpu/mb.c */
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 3889cf4..40d3693 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -178,7 +178,9 @@
asmlinkage int sys_sigreturn(struct pt_regs *regs)
{
- struct sigframe *frame = (struct sigframe *)regs->r1;
+ struct sigframe *frame =
+ (struct sigframe *)(regs->r1 + STATE_SAVE_ARG_SPACE);
+
sigset_t set;
int rval;
@@ -209,7 +211,9 @@
asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
{
- struct rt_sigframe *frame = (struct rt_sigframe *)regs->r1;
+ struct rt_sigframe *frame =
+ (struct rt_sigframe *)(regs->r1 + STATE_SAVE_ARG_SPACE);
+
sigset_t set;
stack_t st;
int rval;
@@ -336,7 +340,8 @@
goto give_sigsegv;
/* Set up registers for signal handler */
- regs->r1 = (unsigned long) frame;
+ regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE;
+
/* Signal handler args: */
regs->r5 = signal; /* Arg 0: signum */
regs->r6 = (unsigned long) &frame->sc; /* arg 1: sigcontext */
@@ -414,7 +419,8 @@
goto give_sigsegv;
/* Set up registers for signal handler */
- regs->r1 = (unsigned long) frame;
+ regs->r1 = (unsigned long) frame - STATE_SAVE_ARG_SPACE;
+
/* Signal handler args: */
regs->r5 = signal; /* arg 0: signum */
regs->r6 = (unsigned long) &frame->info; /* arg 1: siginfo */