[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20150109154924.GH11258@arm.com>
Date: Fri, 9 Jan 2015 15:49:24 +0000
From: Will Deacon <will.deacon@....com>
To: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc: "leif.lindholm@...aro.org" <leif.lindholm@...aro.org>,
"roy.franz@...aro.org" <roy.franz@...aro.org>,
"matt.fleming@...el.com" <matt.fleming@...el.com>,
Catalin Marinas <Catalin.Marinas@....com>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
"bp@...en8.de" <bp@...en8.de>,
"msalter@...hat.com" <msalter@...hat.com>,
"geoff.levand@...aro.org" <geoff.levand@...aro.org>,
"dyoung@...hat.com" <dyoung@...hat.com>,
Mark Rutland <Mark.Rutland@....com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 7/8] arm64/efi: remove free_boot_services() and friends
On Thu, Jan 08, 2015 at 06:48:33PM +0000, Ard Biesheuvel wrote:
> Now that we are calling SetVirtualAddressMap() from the stub, there is no
> need to reserve boot-only memory regions, which implies that there is also
> no reason to free them again later.
>
> Acked-by: Leif Lindholm <leif.lindholm@...aro.org>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
> ---
> arch/arm64/kernel/efi.c | 123 +-----------------------------------------------
> 1 file changed, 1 insertion(+), 122 deletions(-)
[...]
> -static void __init free_boot_services(void)
> -{
> - u64 total_freed = 0;
> - u64 keep_end, free_start, free_end;
> - efi_memory_desc_t *md;
> -
> - /*
> - * If kernel uses larger pages than UEFI, we have to be careful
> - * not to inadvertantly free memory we want to keep if there is
> - * overlap at the kernel page size alignment. We do not want to
> - * free is_reserve_region() memory nor the UEFI memmap itself.
> - *
> - * The memory map is sorted, so we keep track of the end of
> - * any previous region we want to keep, remember any region
> - * we want to free and defer freeing it until we encounter
> - * the next region we want to keep. This way, before freeing
> - * it, we can clip it as needed to avoid freeing memory we
> - * want to keep for UEFI.
> - */
> -
> - keep_end = 0;
> - free_start = 0;
> -
> - for_each_efi_memory_desc(&memmap, md) {
> - u64 paddr, npages, size;
I'm glad to see the back of this function, thanks.
Acked-by: Will Deacon <will.deacon@....com>
Will
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists