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author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-15 11:30:23 +0300 |
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committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-11-02 10:31:54 +0300 |
commit | 6d212db11947ae5464e4717536ed9faf61c01e86 (patch) | |
tree | 1de9816d69f5a602ad0218b2a33af0efaa0297eb /arch/s390/include/asm/pgtable.h | |
parent | 1071fc5779d9846fec56a4ff6089ab08cac1ab72 (diff) | |
download | linux-6d212db11947ae5464e4717536ed9faf61c01e86.tar.xz |
mm: add mm_pxd_folded checks to pgtable_bytes accounting functions
The common mm code calls mm_dec_nr_pmds() and mm_dec_nr_puds()
in free_pgtables() if the address range spans a full pud or pmd.
If mm_dec_nr_puds/mm_dec_nr_pmds are non-empty due to configuration
settings they blindly subtract the size of the pmd or pud table from
pgtable_bytes even if the pud or pmd page table layer is folded.
Add explicit mm_[pmd|pud]_folded checks to the four pgtable_bytes
accounting functions mm_inc_nr_puds, mm_inc_nr_pmds, mm_dec_nr_puds
and mm_dec_nr_pmds. As the check for folded page tables can be
overwritten by the architecture, this allows to keep a correct
pgtable_bytes value for platforms that use a dynamic number of
page table levels.
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/pgtable.h')
0 files changed, 0 insertions, 0 deletions