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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-08-07 15:16:15 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-08-09 15:09:35 +0200 |
| commit | cd4386a931b6310b05559d2e28efda04d30ab593 (patch) | |
| tree | d1fbc2a6a8e86af9308ce8713e842e6717471c8e /drivers/s390 | |
| parent | s390/vmcp: fix uaccess check and avoid undefined behavior (diff) | |
| download | linux-cd4386a931b6310b05559d2e28efda04d30ab593.tar.xz linux-cd4386a931b6310b05559d2e28efda04d30ab593.zip | |
s390/cpcmd,vmcp: avoid GFP_DMA allocations
According to the CP Programming Services manual Diagnose Code 8
"Virtual Console Function" can be used in all addressing modes. Also
the input and output buffers do not have a limitation which specifies
they need to be below the 2GB line.
This is true at least since z/VM 5.4.
Therefore remove the sam31/64 instructions and allow for simple
GFP_KERNEL allocations. This makes it easier to allocate a 1MB page
if the user requested such a large return buffer.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/char/vmcp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c index 66d5e9f83e0d..b5e3a49745f9 100644 --- a/drivers/s390/char/vmcp.c +++ b/drivers/s390/char/vmcp.c @@ -98,7 +98,7 @@ vmcp_write(struct file *file, const char __user *buff, size_t count, } if (!session->response) session->response = (char *)__get_free_pages(GFP_KERNEL - | __GFP_RETRY_MAYFAIL | GFP_DMA, + | __GFP_RETRY_MAYFAIL, get_order(session->bufsize)); if (!session->response) { mutex_unlock(&session->mutex); |