X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fx86%2Fmm%2Finit.c;h=b278535b14aa00ce5b46de5e5bdd01cc75dc0c8a;hb=06ee772043c7ad125f2c2e6a08dc563706f39e8d;hp=d406c5239019ee0e2e9609c826f1a2ba8564c693;hpb=d5e5deddf67389eabc3d9b13004c108120d397e1;p=pandora-kernel.git

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index d406c5239019..b278535b14aa 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -1,3 +1,4 @@
+#include <linux/gfp.h>
 #include <linux/initrd.h>
 #include <linux/ioport.h>
 #include <linux/swap.h>
@@ -266,16 +267,9 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 	if (!after_bootmem)
 		find_early_table_space(end, use_pse, use_gbpages);
 
-#ifdef CONFIG_X86_32
-	for (i = 0; i < nr_range; i++)
-		kernel_physical_mapping_init(mr[i].start, mr[i].end,
-					     mr[i].page_size_mask);
-	ret = end;
-#else /* CONFIG_X86_64 */
 	for (i = 0; i < nr_range; i++)
 		ret = kernel_physical_mapping_init(mr[i].start, mr[i].end,
 						   mr[i].page_size_mask);
-#endif
 
 #ifdef CONFIG_X86_32
 	early_ioremap_page_table_range_init();
@@ -338,11 +332,23 @@ int devmem_is_allowed(unsigned long pagenr)
 
 void free_init_pages(char *what, unsigned long begin, unsigned long end)
 {
-	unsigned long addr = begin;
+	unsigned long addr;
+	unsigned long begin_aligned, end_aligned;
+
+	/* Make sure boundaries are page aligned */
+	begin_aligned = PAGE_ALIGN(begin);
+	end_aligned   = end & PAGE_MASK;
 
-	if (addr >= end)
+	if (WARN_ON(begin_aligned != begin || end_aligned != end)) {
+		begin = begin_aligned;
+		end   = end_aligned;
+	}
+
+	if (begin >= end)
 		return;
 
+	addr = begin;
+
 	/*
 	 * If debugging page accesses then do not free this memory but
 	 * mark them not present - any buggy init-section access will
@@ -350,7 +356,7 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
 	 */
 #ifdef CONFIG_DEBUG_PAGEALLOC
 	printk(KERN_INFO "debug: unmapping init memory %08lx..%08lx\n",
-		begin, PAGE_ALIGN(end));
+		begin, end);
 	set_memory_np(begin, (end - begin) >> PAGE_SHIFT);
 #else
 	/*
@@ -365,8 +371,7 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
 	for (; addr < end; addr += PAGE_SIZE) {
 		ClearPageReserved(virt_to_page(addr));
 		init_page_count(virt_to_page(addr));
-		memset((void *)(addr & ~(PAGE_SIZE-1)),
-			POISON_FREE_INITMEM, PAGE_SIZE);
+		memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
 		free_page(addr);
 		totalram_pages++;
 	}
@@ -383,6 +388,15 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_init_pages("initrd memory", start, end);
+	/*
+	 * end could be not aligned, and We can not align that,
+	 * decompresser could be confused by aligned initrd_end
+	 * We already reserve the end partial page before in
+	 *   - i386_start_kernel()
+	 *   - x86_64_start_kernel()
+	 *   - relocate_initrd()
+	 * So here We can do PAGE_ALIGN() safely to get partial page to be freed
+	 */
+	free_init_pages("initrd memory", start, PAGE_ALIGN(end));
 }
 #endif