Commit 69700fb4 authored by Heiko Carstens's avatar Heiko Carstens
Browse files

s390/cmm: add missing virt_to_phys() conversion 



diag10_range() expects a pfn, however the current cmm code is shifting
a virtual address, instead of a physical address by PAGE_SHIFT bits,
which would give a wrong result in case if V!=R.

Use virt_to_pfn() to fix this.

Note: this currently doesn't fix a real bug, since virtual addresses
are indentical to physical ones.

Reviewed-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent 9d6305c2

arch/s390/mm/cmm.c

+1 −1
Original line number Diff line number Diff line
@@ -90,7 +90,7 @@ static long cmm_alloc_pages(long nr, long *counter, 
			} else

				free_page((unsigned long) npa);

		}

		diag10_range(addr >> PAGE_SHIFT, 1);

		diag10_range(virt_to_pfn(addr), 1);

		pa->pages[pa->index++] = addr;

		(*counter)++;

		spin_unlock(&cmm_lock);