x86: create a non-zero sized bm_pte only when needed

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Impact: kernel image size reduction

Since in most configurations the pmd page needed maps the same range of
virtual addresses which is also mapped by the earlier inserted one for
covering FIX_DBGP_BASE, that page (and its insertion in the page
tables) can be avoided altogether by detecting the condition at compile
time.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <49B91826.76E4.0078.0@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Jan Beulich 2009-03-12 13:11:50 +00:00 • committed by Ingo Molnar

parent 5c0e6f035d

commit 698609bdcd

1 changed files with 16 additions and 3 deletions

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19

arch/x86/mm/ioremap.c

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