The lack of common transparent-huge-page helpers for UML is becoming increasingly painful for fs/dax.c now that it is growing more pmd functionality. Add UML to the list of unsupported architectures, and clean up no-longer-necessary ifdef as a result.
Cc: Jan Kara <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Dave Chinner <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Alexander Viro <[email protected]> Cc: Ross Zwisler <[email protected]> Signed-off-by: Dan Williams <[email protected]> --- fs/Kconfig | 2 +- fs/dax.c | 4 +--- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/fs/Kconfig b/fs/Kconfig index c2a377cdda2b..661931fb0ce0 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -37,7 +37,7 @@ source "fs/f2fs/Kconfig" config FS_DAX bool "Direct Access (DAX) support" depends on MMU - depends on !(ARM || MIPS || SPARC) + depends on !(ARM || MIPS || SPARC || UML) help Direct Access (DAX) can be used on memory-backed block devices. If the block device supports DAX and the filesystem supports DAX, diff --git a/fs/dax.c b/fs/dax.c index ddcddfeaa03b..86df835783ea 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -710,8 +710,7 @@ static void dax_mapping_entry_mkclean(struct address_space *mapping, if (follow_pte_pmd(vma->vm_mm, address, &ptep, &pmdp, &ptl)) continue; - if (pmdp) { -#ifdef CONFIG_FS_DAX_PMD + if (pmdp && IS_ENABLED(CONFIG_FS_DAX_PMD)) { pmd_t pmd; if (pfn != pmd_pfn(*pmdp)) @@ -727,7 +726,6 @@ static void dax_mapping_entry_mkclean(struct address_space *mapping, changed = true; unlock_pmd: spin_unlock(ptl); -#endif } else { if (pfn != pte_pfn(*ptep)) goto unlock_pte;
