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ad4f99e888
linux/arch/s390/mm
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Dominik Dingel ad4f99e888 revert "s390/mm: change HPAGE_SHIFT type to int" 
Heiko noticed that the current check for hugepage support on s390 is a
little bit too harsh as systems which do not support will crash.

The reason is that pageblock_order can now get negative when we set
HPAGE_SHIFT to 0.  To avoid all this and to avoid opening another can of
worms with enabling HUGETLB_PAGE_SIZE_VARIABLE I think it would be best
to simply allow architectures to define their own hugepages_supported().

This patch (of 4): revert commit cf54e2fce5 ("s390/mm: change
HPAGE_SHIFT type to int") in preparation.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-07-17 16:39:52 -07:00
..
cmm.c s390: convert use of typedef ctl_table to struct ctl_table 2013-10-28 08:36:25 +01:00
dump_pagetables.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
extable.c s390/exceptions: switch to relative exception table entries 2012-09-26 15:45:10 +02:00
extmem.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
fault.c mm/fault, arch: Use pagefault_disable() to check for disabled pagefaults in the handler 2015-05-19 08:39:15 +02:00
gup.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
hugetlbpage.c s390/mm: forward check for huge pmds to pmd_large() 2015-06-25 17:00:35 -07:00
init.c s390/sclp: unify basic sclp access by exposing "struct sclp" 2015-05-13 09:58:17 +02:00
maccess.c s390/maccess: improve s390_kernel_write() 2015-03-25 11:49:44 +01:00
Makefile s390/mem_detect: move memory detection code to mm folder 2013-05-02 15:50:22 +02:00
mem_detect.c s390/sclp: unify basic sclp access by exposing "struct sclp" 2015-05-13 09:58:17 +02:00
mmap.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2015-04-14 20:51:44 -07:00
page-states.c s390/cmma: remove "cmma disable" code in case of dump again 2014-05-20 08:58:42 +02:00
pageattr.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
pgtable.c revert "s390/mm: change HPAGE_SHIFT type to int" 2015-07-17 16:39:52 -07:00
vmem.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00