The patch titled
Subject: mm/ioremap: fix iomap_max_page_shift
has been added to the -mm tree. Its filename is
mm-ioremap-fix-iomap_max_page_shift.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-ioremap-fix-iomap_max_page_shift.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-ioremap-fix-iomap_max_page_shift.patch
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------------------------------------------------------
From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Subject: mm/ioremap: fix iomap_max_page_shift
iomap_max_page_shift is expected to contain a page shift,
so it can't be a 'bool', has to be an 'unsigned int'
And fix the default values: P4D_SHIFT is when huge iomap is allowed.
Link: https://lkml.kernel.org/r/0d615a242c4470462da547dc332e4ec5f00479dd.1619855673.git.christophe.leroy@xxxxxxxxxx
Fixes: bbc180a5adb05ee ("mm: HUGE_VMAP arch support cleanup")
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Reviewed-by: Nicholas Piggin <npiggin@xxxxxxxxx>
Reviewed-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/ioremap.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/ioremap.c~mm-ioremap-fix-iomap_max_page_shift
+++ a/mm/ioremap.c
@@ -16,16 +16,16 @@
#include "pgalloc-track.h"
#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
-static bool __ro_after_init iomap_max_page_shift = PAGE_SHIFT;
+static unsigned int __ro_after_init iomap_max_page_shift = P4D_SHIFT;
static int __init set_nohugeiomap(char *str)
{
- iomap_max_page_shift = P4D_SHIFT;
+ iomap_max_page_shift = PAGE_SHIFT;
return 0;
}
early_param("nohugeiomap", set_nohugeiomap);
#else /* CONFIG_HAVE_ARCH_HUGE_VMAP */
-static const bool iomap_max_page_shift = PAGE_SHIFT;
+static const unsigned int iomap_max_page_shift = PAGE_SHIFT;
#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
int ioremap_page_range(unsigned long addr,
_
Patches currently in -mm which might be from christophe.leroy@xxxxxxxxxx are
mm-ioremap-fix-iomap_max_page_shift.patch
