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authorNick Piggin <npiggin@suse.de>2007-07-19 04:47:05 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-19 13:04:41 -0400
commit83c54070ee1a2d05c89793884bea1a03f2851ed4 (patch)
treedc732f5a9b93fb7004ed23f551bd98b77cc580e0 /arch/frv/mm
parentd0217ac04ca6591841e5665f518e38064f4e65bd (diff)
mm: fault feedback #2
This patch completes Linus's wish that the fault return codes be made into bit flags, which I agree makes everything nicer. This requires requires all handle_mm_fault callers to be modified (possibly the modifications should go further and do things like fault accounting in handle_mm_fault -- however that would be for another patch). [akpm@linux-foundation.org: fix alpha build] [akpm@linux-foundation.org: fix s390 build] [akpm@linux-foundation.org: fix sparc build] [akpm@linux-foundation.org: fix sparc64 build] [akpm@linux-foundation.org: fix ia64 build] Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ian Molton <spyro@f2s.com> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Greg Ungerer <gerg@uclinux.org> Cc: Matthew Wilcox <willy@debian.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Chris Zankel <chris@zankel.net> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> [ Still apparently needs some ARM and PPC loving - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/frv/mm')
-rw-r--r--arch/frv/mm/fault.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/arch/frv/mm/fault.c b/arch/frv/mm/fault.c
index 3f12296c3688..6798fa0257b1 100644
--- a/arch/frv/mm/fault.c
+++ b/arch/frv/mm/fault.c
@@ -40,6 +40,7 @@ asmlinkage void do_page_fault(int datammu, unsigned long esr0, unsigned long ear
40 pud_t *pue; 40 pud_t *pue;
41 pte_t *pte; 41 pte_t *pte;
42 int write; 42 int write;
43 int fault;
43 44
44#if 0 45#if 0
45 const char *atxc[16] = { 46 const char *atxc[16] = {
@@ -162,18 +163,18 @@ asmlinkage void do_page_fault(int datammu, unsigned long esr0, unsigned long ear
162 * make sure we exit gracefully rather than endlessly redo 163 * make sure we exit gracefully rather than endlessly redo
163 * the fault. 164 * the fault.
164 */ 165 */
165 switch (handle_mm_fault(mm, vma, ear0, write)) { 166 fault = handle_mm_fault(mm, vma, ear0, write);
166 case VM_FAULT_MINOR: 167 if (unlikely(fault & VM_FAULT_ERROR)) {
167 current->min_flt++; 168 if (fault & VM_FAULT_OOM)
168 break; 169 goto out_of_memory;
169 case VM_FAULT_MAJOR: 170 else if (fault & VM_FAULT_SIGBUS)
170 current->maj_flt++; 171 goto do_sigbus;
171 break; 172 BUG();
172 case VM_FAULT_SIGBUS:
173 goto do_sigbus;
174 default:
175 goto out_of_memory;
176 } 173 }
174 if (fault & VM_FAULT_MAJOR)
175 current->maj_flt++;
176 else
177 current->min_flt++;
177 178
178 up_read(&mm->mmap_sem); 179 up_read(&mm->mmap_sem);
179 return; 180 return;