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SubjectRe: [PATCH] x86: e820: Implement a range manipulation operator
On Fri, Feb 2, 2018 at 1:13 AM, Jan H. Schönherr <jschoenh@amazon.de> wrote:

> + [KNL,ACPI] Convert memory within the specified region
> + from <oldtype> to <newtype>. If "-<oldtype>" is left
> + out, the whole region will be marked as <newtype>,
> + even if previously unavailable. If "+<newtype>" is left
> + out, matching memory will be removed. Types are
> + specified as e820 types, eg, 1==RAM, 2==reserved,
> + 3==ACPI, 12==PRAM.

s/==/ = /g


> + } else if (*p == '%') {
> + enum e820_type from = 0, to = 0;
> +
> + start_at = memparse(p + 1, &p);
> + if (*p == '-')
> + from = simple_strtoull(p + 1, &p, 0);
> + if (*p == '+')
> + to = simple_strtoull(p + 1, &p, 0);
> + if (*p != 0)

if (*p)

or

if (*p != '\0')

?

> + return -EINVAL;
> + if (from && to)
> + e820__range_update(start_at, mem_size, from, to);
> + else if (to)
> + e820__range_add(start_at, mem_size, to);
> + else if (from)
> + e820__range_remove(start_at, mem_size, from, 1);
> + else
> + e820__range_remove(start_at, mem_size, 0, 0);

--
With Best Regards,
Andy Shevchenko

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