[PATCH AUTOSEL 5.4 048/130] MIPS: vdso: Use vma page protection for remapping

[Sasha Levin]

From: Thomas Bogendoerfer <tsbog...@alpha.franken.de>

[ Upstream commit 724d554a117a0552c2c982f0b5cd1d685274d678 ]

MIPS protection bits are setup during runtime so using defines like
PAGE_READONLY ignores these runtime changes. To fix this we simply
use the page protection of the setup vma.

Signed-off-by: Thomas Bogendoerfer <tsbog...@alpha.franken.de>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 arch/mips/kernel/vdso.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/mips/kernel/vdso.c b/arch/mips/kernel/vdso.c
index bc35f8499111b..cea83d2866e34 100644
--- a/arch/mips/kernel/vdso.c
+++ b/arch/mips/kernel/vdso.c
@@ -157,7 +157,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, 
int uses_interp)
                gic_pfn = virt_to_phys(mips_gic_base + MIPS_GIC_USER_OFS) >> 
PAGE_SHIFT;
 
                ret = io_remap_pfn_range(vma, base, gic_pfn, gic_size,
-                                        pgprot_noncached(PAGE_READONLY));
+                                        pgprot_noncached(vma->vm_page_prot));
                if (ret)
                        goto out;
        }
@@ -165,7 +165,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, 
int uses_interp)
        /* Map data page. */
        ret = remap_pfn_range(vma, data_addr,
                              virt_to_phys(vdso_data) >> PAGE_SHIFT,
-                             PAGE_SIZE, PAGE_READONLY);
+                             PAGE_SIZE, vma->vm_page_prot);
        if (ret)
                goto out;
 
-- 
2.27.0