[PATCH RFC 09/11] misc/sgi-gru: use ptep_get() for page-table reads
From: Muhammad Usama Anjum <hidden>
Date: 2026-07-27 16:48:58
Also in:
bpf, damon, dri-devel, intel-gfx, linux-arch, linux-fsdevel, linux-mm, linux-perf-users, lkml, xen-devel
Subsystem:
char and misc drivers, sgi gru driver, the rest · Maintainers:
Arnd Bergmann, Greg Kroah-Hartman, Dimitri Sivanich, Linus Torvalds
A leaf PMD is being read through ptep_get() by treating the PMD address as PTE-sized table storage. ptep_get() now accepts hw_pte_t *, so update the cast accordingly. pte_offset_kernel() also returns hw_pte_t *. Get pte_t value by calling ptep_get(). Signed-off-by: Muhammad Usama Anjum <redacted> --- drivers/misc/sgi-gru/grufault.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index 3557d78ee47a2..ff89d34ad2aa4 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c@@ -228,10 +228,10 @@ static int atomic_pte_lookup(struct vm_area_struct *vma, unsigned long vaddr, goto err; #ifdef CONFIG_X86_64 if (unlikely(pmd_leaf(*pmdp))) - pte = ptep_get((pte_t *)pmdp); + pte = ptep_get((hw_pte_t *)pmdp); else #endif - pte = *pte_offset_kernel(pmdp, vaddr); + pte = ptep_get(pte_offset_kernel(pmdp, vaddr)); if (unlikely(!pte_present(pte) || (write && (!pte_write(pte) || !pte_dirty(pte)))))
--
2.47.3