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| author | Florian Fainelli <f.fainelli@gmail.com> | 2022-07-07 13:27:58 -0700 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2022-07-11 10:32:07 +0200 |
| commit | 8baa65126e19af5ee9f3c07e7bb53da41c39e4b1 (patch) | |
| tree | a441fb1adf0ca6269d46741f56f68ae1e21ac269 /arch/mips/kernel | |
| parent | b5eb8b536f91f52d4f3688bcae86bf85ba693a00 (diff) | |
| download | linux-8baa65126e19af5ee9f3c07e7bb53da41c39e4b1.tar.gz | |
MIPS: vdso: Utilize __pa() for gic_pfn
The GIC user offset is mapped into every process' virtual address and is
therefore part of the hot-path of arch_setup_additional_pages(). Utilize
__pa() such that we are more optimal even when CONFIG_DEBUG_VIRTUAL is
enabled, and while at it utilize PFN_DOWN() instead of open-coding the
right shift by PAGE_SHIFT.
Reported-by: Greg Ungerer <gerg@kernel.org>
Suggested-by: Serge Semin <fancer.lancer@gmail.com>
Fixes: dfad83cb7193 ("MIPS: Add support for CONFIG_DEBUG_VIRTUAL")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Greg Ungerer <gerg@kernel.org>
Tested-by: Greg Ungerer <gerg@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/vdso.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/kernel/vdso.c b/arch/mips/kernel/vdso.c index 3d0cf471f2fe..b2cc2c2dd4bf 100644 --- a/arch/mips/kernel/vdso.c +++ b/arch/mips/kernel/vdso.c @@ -159,7 +159,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) /* Map GIC user page. */ if (gic_size) { gic_base = (unsigned long)mips_gic_base + MIPS_GIC_USER_OFS; - gic_pfn = virt_to_phys((void *)gic_base) >> PAGE_SHIFT; + gic_pfn = PFN_DOWN(__pa(gic_base)); ret = io_remap_pfn_range(vma, base, gic_pfn, gic_size, pgprot_noncached(vma->vm_page_prot)); |