| Message ID | 1420482835-6444-3-git-send-email-leif.lindholm@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 5 January 2015 at 18:33, Leif Lindholm <leif.lindholm@linaro.org> wrote: > arm64 does not support early_memremap/memunmap/ioremap/iounmap after > paging_init() has been called. The core early_*remap code handles this > via the after_paging_init variable, which is set by a call to > early_ioremap_reset(). > > However, arm64 currently does not call early_ioremap_reset(), which > has made it possible to poke around in the fixmap region after kmap > is enabled. Add the required call. > > Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Perhaps add 'Fixes' and 'Cc: stable' tags as well? > --- > arch/arm64/mm/mmu.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c > index 6032f3e..506544f 100644 > --- a/arch/arm64/mm/mmu.c > +++ b/arch/arm64/mm/mmu.c > @@ -348,6 +348,7 @@ void __init paging_init(void) > { > void *zero_page; > > + early_ioremap_reset(); > map_mem(); > > /* > -- > 2.1.3 >
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 6032f3e..506544f 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -348,6 +348,7 @@ void __init paging_init(void) { void *zero_page; + early_ioremap_reset(); map_mem(); /*
arm64 does not support early_memremap/memunmap/ioremap/iounmap after paging_init() has been called. The core early_*remap code handles this via the after_paging_init variable, which is set by a call to early_ioremap_reset(). However, arm64 currently does not call early_ioremap_reset(), which has made it possible to poke around in the fixmap region after kmap is enabled. Add the required call. Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org> --- arch/arm64/mm/mmu.c | 1 + 1 file changed, 1 insertion(+)