x86/asm: Fix inline asm call constraints for Clang

[mirror_ubuntu-bionic-kernel.git] / arch / x86 / mm / fault.c

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index b836a7274e123af88edd7b4f261da88609778be9..39567b5c33da3b09a8ab6a50509e7de92625d31b 100644 (file)
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -806,7 +806,6 @@ no_context(struct pt_regs *regs, unsigned long error_code,
        if (is_vmalloc_addr((void *)address) &&
            (((unsigned long)tsk->stack - 1 - address < PAGE_SIZE) ||
             address - ((unsigned long)tsk->stack + THREAD_SIZE) < PAGE_SIZE)) {
-               register void *__sp asm("rsp");
                unsigned long stack = this_cpu_read(orig_ist.ist[DOUBLEFAULT_STACK]) - sizeof(void *);
                /*
                 * We're likely to be running with very little stack space
@@ -821,7 +820,7 @@ no_context(struct pt_regs *regs, unsigned long error_code,
                asm volatile ("movq %[stack], %%rsp\n\t"
                              "call handle_stack_overflow\n\t"
                              "1: jmp 1b"
-                             : "+r" (__sp)
+                             : ASM_CALL_CONSTRAINT
                              : "D" ("kernel stack overflow (page fault)"),
                                "S" (regs), "d" (address),
                                [stack] "rm" (stack));