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author | Takashi Iwai <tiwai@suse.de> | 2019-02-28 13:30:55 +0100 |
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committer | Takashi Iwai <tiwai@suse.de> | 2019-02-28 13:30:55 +0100 |
commit | 70395a96bd882d8dba669f99b5cec0008690accd (patch) | |
tree | 37f3a4c2cf35828f153f3ce59c3daa4f39241c32 /arch/powerpc/mm/pgtable-book3s64.c | |
parent | f97a0944a72b26a2bece72516294e112a890f98a (diff) | |
parent | 3146089d235b304e665dc551472ae9cb9ab58572 (diff) |
Merge tag 'asoc-v5.1-2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next
ASoC: More changes for v5.1
Another batch of changes for ASoC, no big core changes - it's mainly
small fixes and improvements for individual drivers.
- A big refresh and cleanup of the Samsung drivers, fixing a number of
issues which allow the driver to be used with a wider range of
userspaces.
- Fixes for the Intel drivers to make them more standard so less likely
to get bitten by core issues.
- New driver for Cirrus Logic CS35L26.
Diffstat (limited to 'arch/powerpc/mm/pgtable-book3s64.c')
-rw-r--r-- | arch/powerpc/mm/pgtable-book3s64.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/powerpc/mm/pgtable-book3s64.c b/arch/powerpc/mm/pgtable-book3s64.c index f3c31f5e1026..ecd31569a120 100644 --- a/arch/powerpc/mm/pgtable-book3s64.c +++ b/arch/powerpc/mm/pgtable-book3s64.c @@ -400,3 +400,25 @@ void arch_report_meminfo(struct seq_file *m) atomic_long_read(&direct_pages_count[MMU_PAGE_1G]) << 20); } #endif /* CONFIG_PROC_FS */ + +/* + * For hash translation mode, we use the deposited table to store hash slot + * information and they are stored at PTRS_PER_PMD offset from related pmd + * location. Hence a pmd move requires deposit and withdraw. + * + * For radix translation with split pmd ptl, we store the deposited table in the + * pmd page. Hence if we have different pmd page we need to withdraw during pmd + * move. + * + * With hash we use deposited table always irrespective of anon or not. + * With radix we use deposited table only for anonymous mapping. + */ +int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl, + struct spinlock *old_pmd_ptl, + struct vm_area_struct *vma) +{ + if (radix_enabled()) + return (new_pmd_ptl != old_pmd_ptl) && vma_is_anonymous(vma); + + return true; +} |