MIPS: Rewrite sysmips(MIPS_ATOMIC_SET, ...) in C with inline assembler

This way it doesn't have to use CONFIG_CPU_HAS_LLSC anymore.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 0 insertions, 72 deletions

diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index 3d866f24e064..b97b993846d6 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -124,78 +124,6 @@ illegal_syscall:
         j       n64_syscall_exit
         END(handle_sys64)
 
-        LEAF(mips_atomic_set)
-        andi    v0, a1, 3                       # must be word aligned
-        bnez    v0, bad_alignment
-
-        LONG_L  v1, TI_ADDR_LIMIT($28)          # in legal address range?
-        LONG_ADDIU      a0, a1, 4
-        or      a0, a0, a1
-        and     a0, a0, v1
-        bltz    a0, bad_address
-
-#ifdef CONFIG_CPU_HAS_LLSC
-        /* Ok, this is the ll/sc case.  World is sane :-)  */
-1:      ll      v0, (a1)
-        move    a0, a2
-2:      sc      a0, (a1)
-#if R10000_LLSC_WAR
-        beqzl   a0, 1b
-#else
-        beqz    a0, 1b
-#endif
-
-        .section __ex_table,"a"
-        PTR     1b, bad_stack
-        PTR     2b, bad_stack
-        .previous
-#else
-        sw      a1, 16(sp)
-        sw      a2, 20(sp)
-
-        move    a0, sp
-        move    a2, a1
-        li      a1, 1
-        jal     do_page_fault
-
-        lw      a1, 16(sp)
-        lw      a2, 20(sp)
-
-        /*
-         * At this point the page should be readable and writable unless
-         * there was no more memory available.
-         */
-1:      lw      v0, (a1)
-2:      sw      a2, (a1)
-
-        .section __ex_table,"a"
-        PTR     1b, no_mem
-        PTR     2b, no_mem
-        .previous
-#endif
-
-        sd      zero, PT_R7(sp)         # success
-        sd      v0, PT_R2(sp)           # result
-
-        j       n64_syscall_exit        # continue like a normal syscall
-
-no_mem: li      v0, -ENOMEM
-        jr      ra
-
-bad_address:
-        li      v0, -EFAULT
-        jr      ra
-
-bad_alignment:
-        li      v0, -EINVAL
-        jr      ra
-        END(mips_atomic_set)
-
-        LEAF(sys_sysmips)
-        beq     a0, MIPS_ATOMIC_SET, mips_atomic_set
-        j       _sys_sysmips
-        END(sys_sysmips)
-
         .align  3
 sys_call_table:
         PTR     sys_read                        /* 5000 */