[MIPS] signal32: no need to save c0_status register in setup_sigcontext32()
All the information in the MIPS c0_status register is priviledged.
Nothing that would constitute part of the thread context.
The one flag one could possibly argument about might be c0_status.fr
but none of the ABIs or tools or application software can make use
of it.
So for consistency with restore_sigcontext32(), which does not
restore c0_status register, this patch remove the saving part.
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c
index ea7df4b..c0b089d 100644
--- a/arch/mips/kernel/asm-offsets.c
+++ b/arch/mips/kernel/asm-offsets.c
@@ -249,7 +249,6 @@
offset("#define SC_MDHI ", struct sigcontext, sc_mdhi);
offset("#define SC_MDLO ", struct sigcontext, sc_mdlo);
offset("#define SC_PC ", struct sigcontext, sc_pc);
- offset("#define SC_STATUS ", struct sigcontext, sc_status);
offset("#define SC_FPC_CSR ", struct sigcontext, sc_fpc_csr);
offset("#define SC_FPC_EIR ", struct sigcontext, sc_fpc_eir);
offset("#define SC_HI1 ", struct sigcontext, sc_hi1);
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 5d102ef..0994d6e 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -170,7 +170,6 @@
int i;
err |= __put_user(regs->cp0_epc, &sc->sc_pc);
- err |= __put_user(regs->cp0_status, &sc->sc_status);
err |= __put_user(0, &sc->sc_regs[0]);
for (i = 1; i < 32; i++)
diff --git a/include/asm-mips/sigcontext.h b/include/asm-mips/sigcontext.h
index cefa657..3c175a7 100644
--- a/include/asm-mips/sigcontext.h
+++ b/include/asm-mips/sigcontext.h
@@ -19,7 +19,7 @@
*/
struct sigcontext {
unsigned int sc_regmask; /* Unused */
- unsigned int sc_status;
+ unsigned int sc_status; /* Unused */
unsigned long long sc_pc;
unsigned long long sc_regs[32];
unsigned long long sc_fpregs[32];
@@ -76,7 +76,7 @@
struct sigcontext32 {
__u32 sc_regmask; /* Unused */
- __u32 sc_status;
+ __u32 sc_status; /* Unused */
__u64 sc_pc;
__u64 sc_regs[32];
__u64 sc_fpregs[32];