luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[S390] pm: add kernel_page_present

Browse Source 
Fix the following build failure caused by make allyesconfig using
CONFIG_HIBERNATION and CONFIG_DEBUG_PAGEALLOC

kernel/built-in.o: In function `saveable_page':
kernel/power/snapshot.c:897: undefined reference to `kernel_page_present'
kernel/built-in.o: In function `safe_copy_page':
kernel/power/snapshot.c:948: undefined reference to `kernel_page_present'
make: *** [.tmp_vmlinux1] Error 1

Signed-off-by: Hans-Joachim Picht <hans@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Hans-Joachim Picht 2009-06-16 10:30:26 +02:00 committed by Martin Schwidefsky
parent d41dd122ac
commit 7db11a363f
1 changed files with 19 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/s390/mm/pgtable.c
View File

@ -313,3 +313,22 @@ int s390_enable_sie(void)
return 0;
}
EXPORT_SYMBOL_GPL(s390_enable_sie);
#ifdef CONFIG_DEBUG_PAGEALLOC
#ifdef CONFIG_HIBERNATION
bool kernel_page_present(struct page *page)
{
unsigned long addr;
int cc;
addr = page_to_phys(page);
asm("lra %1,0(%1)\n"
"ipm %0\n"
"srl %0,28"
:"=d"(cc),"+a"(addr)::"cc");
return cc == 0;
}
#endif /* CONFIG_HIBERNATION */
#endif /* CONFIG_DEBUG_PAGEALLOC */