Unverified Commit 21733cb5 authored by Eric Lin's avatar Eric Lin Committed by Palmer Dabbelt
Browse files

riscv/mm: Introduce a die_kernel_fault() helper function 



Like arm64, this patch adds a die_kernel_fault() helper
to ensure the same semantics for the different kernel faults.

Signed-off-by: default avatarEric Lin <tesheng@andestech.com>
Reviewed-by: default avatarPekka Enberg <penberg@kernel.org>
Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
parent 641e8cd2

arch/riscv/mm/fault.c

+17 −6
Original line number Diff line number Diff line
@@ -19,8 +19,23 @@ 


#include "../kernel/head.h"



static void die_kernel_fault(const char *msg, unsigned long addr,

		struct pt_regs *regs)

{

	bust_spinlocks(1);



	pr_alert("Unable to handle kernel %s at virtual address " REG_FMT "\n", msg,

		addr);



	bust_spinlocks(0);

	die(regs, "Oops");

	do_exit(SIGKILL);

}



static inline void no_context(struct pt_regs *regs, unsigned long addr)

{

	const char *msg;



	/* Are we prepared to handle this kernel fault? */

	if (fixup_exception(regs))

		return;
@@ -29,12 +44,8 @@ static inline void no_context(struct pt_regs *regs, unsigned long addr) 
	 * Oops. The kernel tried to access some bad page. We'll have to

	 * terminate things with extreme prejudice.

	 */

	bust_spinlocks(1);

	pr_alert("Unable to handle kernel %s at virtual address " REG_FMT "\n",

		(addr < PAGE_SIZE) ? "NULL pointer dereference" :

		"paging request", addr);

	die(regs, "Oops");

	do_exit(SIGKILL);

	msg = (addr < PAGE_SIZE) ? "NULL pointer dereference" : "paging request";

	die_kernel_fault(msg, addr, regs);

}



static inline void mm_fault_error(struct pt_regs *regs, unsigned long addr, vm_fault_t fault)