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authorRafael J. Wysocki <rjw@sisk.pl>2008-02-19 19:47:44 -0500
committerLen Brown <len.brown@intel.com>2008-02-21 02:15:28 -0500
commit8a235efad548abd2ab5ebea45a9ffa750c814375 (patch)
tree9b8c6c1fa3d2e28d9bb198d7019cba8883d5299e /include/linux/mm.h
parente80af3a8dbbbf431b2070cc760699f01c5a6ac69 (diff)
Hibernation: Handle DEBUG_PAGEALLOC on x86
Make hibernation work with CONFIG_DEBUG_PAGEALLOC set on x86, by checking if the pages to be copied are marked as present in the kernel mapping and temporarily marking them as present if that's not the case. No functional modifications are introduced if CONFIG_DEBUG_PAGEALLOC is unset. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 26c7124b841..3b3e1341163 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1171,12 +1171,18 @@ static inline void enable_debug_pagealloc(void)
1171{ 1171{
1172 debug_pagealloc_enabled = 1; 1172 debug_pagealloc_enabled = 1;
1173} 1173}
1174#ifdef CONFIG_HIBERNATION
1175extern bool kernel_page_present(struct page *page);
1176#endif /* CONFIG_HIBERNATION */
1174#else 1177#else
1175static inline void 1178static inline void
1176kernel_map_pages(struct page *page, int numpages, int enable) {} 1179kernel_map_pages(struct page *page, int numpages, int enable) {}
1177static inline void enable_debug_pagealloc(void) 1180static inline void enable_debug_pagealloc(void)
1178{ 1181{
1179} 1182}
1183#ifdef CONFIG_HIBERNATION
1184static inline bool kernel_page_present(struct page *page) { return true; }
1185#endif /* CONFIG_HIBERNATION */
1180#endif 1186#endif
1181 1187
1182extern struct vm_area_struct *get_gate_vma(struct task_struct *tsk); 1188extern struct vm_area_struct *get_gate_vma(struct task_struct *tsk);