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[S390] replace diag10() with diag10_range() function

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Currently the diag10() function can only release one page. For exploiters
that have to call diag10 on a contiguous memory region this is suboptimal.
This patch replaces the diag10() function with diag10_range() that is
able to release multiple pages. In addition to that the new function now
allows to release memory with addresses higher than 2047 MiB. This was
due to a restriction of the diagnose implementation under z/VM prior to
release 5.2.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu
2011-05-10 17:13:41 +02:00
committed by Martin Schwidefsky
parent 91d378088b
commit 83ace2701b
3 changed files with 16 additions and 24 deletions
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arch/s390/mm/cmm.c
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@@ -91,7 +91,7 @@ static long cmm_alloc_pages(long nr, long *counter,
} else
free_page((unsigned long) npa);
}
diag10(addr);
diag10_range(addr >> PAGE_SHIFT, 1);
pa->pages[pa->index++] = addr;
(*counter)++;
spin_unlock(&cmm_lock);