From: Paolo 'Blaisorblade' Giarrusso <[email protected]>
Correct commit 5906e4171ad61ce68de95e51b773146707671f80 - this makes more sense:
we turn pte_mkexec + pte_wrprotect to pte_mkread. However, due to a bug in
pte_mkread, it does the exact same thing as pte_mkwrite, so this patch improves
the code but does not change anything in practice. The pte_mkread bug is fixed
separately, as it may have big impact.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[email protected]>
---
arch/um/kernel/skas/mmu.c | 5 +----
1 files changed, 1 insertions(+), 4 deletions(-)
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index c17eddc..2c6d090 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -60,10 +60,7 @@ #ifdef CONFIG_3_LEVEL_PGTABLES
#endif
*pte = mk_pte(virt_to_page(kernel), __pgprot(_PAGE_PRESENT));
- /* This is wrong for the code page, but it doesn't matter since the
- * stub is mapped by hand with the correct permissions.
- */
- *pte = pte_mkwrite(*pte);
+ *pte = pte_mkread(*pte);
return(0);
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