From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Thu, 4 Aug 2005 13:17:33 +0000 (+0100)
Subject: [PATCH] ARM: Fix ARM fault handler for get_user_pages() fixes.
X-Git-Tag: Ubuntu-5.2.0-15.16~57720^2
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=ff2afb9df607dfcaacdaf67ea84b773c6fb08f4c;p=mirror_ubuntu-eoan-kernel.git

[PATCH] ARM: Fix ARM fault handler for get_user_pages() fixes.

The ARM fault handler is optimised to make the fast path, err, fast.
The renumbering of the VM_FAULT_* codes broke this because numbers
were used instead of the definitions.  Fix this.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 65bfe84b6d67..0b6c4db44e08 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -238,9 +238,9 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 	up_read(&mm->mmap_sem);
 
 	/*
-	 * Handle the "normal" case first
+	 * Handle the "normal" case first - VM_FAULT_MAJOR / VM_FAULT_MINOR
 	 */
-	if (fault > 0)
+	if (fault >= VM_FAULT_MINOR)
 		return 0;
 
 	/*
@@ -261,7 +261,7 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 		do_exit(SIGKILL);
 		return 0;
 
-	case 0:
+	case VM_FAULT_SIGBUS:
 		/*
 		 * We had some memory, but were unable to
 		 * successfully fix up this page fault.