diff options
Diffstat (limited to 'include/linux/pgtable.h')
| -rw-r--r-- | include/linux/pgtable.h | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index c5a51481bbb9..8ec27fe69dc8 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -1345,23 +1345,6 @@ static inline int pmd_none_or_trans_huge_or_clear_bad(pmd_t *pmd) { pmd_t pmdval = pmdp_get_lockless(pmd); /* - * The barrier will stabilize the pmdval in a register or on - * the stack so that it will stop changing under the code. - * - * When CONFIG_TRANSPARENT_HUGEPAGE=y on x86 32bit PAE, - * pmdp_get_lockless is allowed to return a not atomic pmdval - * (for example pointing to an hugepage that has never been - * mapped in the pmd). The below checks will only care about - * the low part of the pmd with 32bit PAE x86 anyway, with the - * exception of pmd_none(). So the important thing is that if - * the low part of the pmd is found null, the high part will - * be also null or the pmd_none() check below would be - * confused. - */ -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - barrier(); -#endif - /* * !pmd_present() checks for pmd migration entries * * The complete check uses is_pmd_migration_entry() in linux/swapops.h |