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| author |   Mike Rapoport <rppt@linux.ibm.com> | 2020-05-23 22:57:18 +0300 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-05-23 13:59:12 -0700 |
| commit | 0cfc8a8d70dcd51db783e8e87917e02149c71458 (patch) | |
| tree | 68b7293e8da1f1cdee1f5fb98d44f7ff9453b1c6 /arch | |
| parent | Merge branch 'akpm' (patches from Andrew) (diff) | |
| download | linux-dev-0cfc8a8d70dcd51db783e8e87917e02149c71458.tar.xz linux-dev-0cfc8a8d70dcd51db783e8e87917e02149c71458.zip | |
sparc32: fix page table traversal in srmmu_nocache_init()
The srmmu_nocache_init() uses __nocache_fix() macro to add an offset to
page table entry to access srmmu_nocache_pool.
But since sparc32 has only three actual page table levels, pgd, p4d and
pud are essentially the same thing and pgd_offset() and p4d_offset() are
no-ops, the __nocache_fix() should be done only at PUD level.
Remove __nocache_fix() for p4d_offset() and pud_offset() and keep it
only for PUD and lower levels.
Fixes: c2bc26f7ca1f ("sparc32: use PUD rather than PGD to get PMD in srmmu_nocache_init()")
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Anatoly Pugachev <matorola@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc/mm/srmmu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c index e9f7af32da07..a8c2f2615fc6 100644 --- a/arch/sparc/mm/srmmu.c +++ b/arch/sparc/mm/srmmu.c @@ -331,8 +331,8 @@ static void __init srmmu_nocache_init(void) while (vaddr < srmmu_nocache_end) { pgd = pgd_offset_k(vaddr); - p4d = p4d_offset(__nocache_fix(pgd), vaddr); - pud = pud_offset(__nocache_fix(p4d), vaddr); + p4d = p4d_offset(pgd, vaddr); + pud = pud_offset(p4d, vaddr); pmd = pmd_offset(__nocache_fix(pud), vaddr); pte = pte_offset_kernel(__nocache_fix(pmd), vaddr); |