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| author |   Heiko Carstens <hca@linux.ibm.com> | 2021-12-07 19:24:00 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2021-12-10 16:14:25 +0100 |
| commit | 69700fb4389839dae84024b39a02cab844651122 (patch) | |
| tree | e87b12176c9669dcdd688b57cc5d6b0b6b3bf3c4 /arch/s390/mm | |
| parent | s390/diag: use pfn_to_phys() instead of open coding (diff) | |
| download | linux-dev-69700fb4389839dae84024b39a02cab844651122.tar.xz linux-dev-69700fb4389839dae84024b39a02cab844651122.zip | |
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: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/cmm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c index 2203164b39da..9141ed4c52e9 100644 --- a/arch/s390/mm/cmm.c +++ b/arch/s390/mm/cmm.c @@ -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); |