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Date: Fri, 22 Jan 2010 01:24:29 -0800 From: Yinghai Lu <yinghai@...nel.org> To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com>, Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org> Cc: Jesse Barnes <jbarnes@...tuousgeek.org>, Christoph Lameter <cl@...ux-foundation.org>, linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org, Yinghai Lu <yinghai@...nel.org> Subject: [PATCH 20/38] x86: add find_early_area_size prepare to move bck find_e820_area_size back to e820.c Signed-off-by: Yinghai Lu <yinghai@...nel.org> --- arch/x86/kernel/early_res.c | 45 ++++++++++++++++++++++++++++++------------ 1 files changed, 32 insertions(+), 13 deletions(-) diff --git a/arch/x86/kernel/early_res.c b/arch/x86/kernel/early_res.c index 3ae0051..aba02f2 100644 --- a/arch/x86/kernel/early_res.c +++ b/arch/x86/kernel/early_res.c @@ -476,6 +476,29 @@ out: return -1ULL; } +u64 __init find_early_area_size(u64 ei_start, u64 ei_last, u64 start, + u64 *sizep, u64 align) +{ + u64 addr, last; + + addr = round_up(ei_start, align); + if (addr < start) + addr = round_up(start, align); + if (addr >= ei_last) + goto out; + *sizep = ei_last - addr; + while (bad_addr_size(&addr, sizep, align) && addr + *sizep <= ei_last) + ; + last = addr + *sizep; + if (last > ei_last) + goto out; + + return addr; + +out: + return -1ULL; +} + /* * Find a free area with specified alignment in a specific range. */ @@ -513,24 +536,20 @@ u64 __init find_e820_area_size(u64 start, u64 *sizep, u64 align) for (i = 0; i < e820.nr_map; i++) { struct e820entry *ei = &e820.map[i]; - u64 addr, last; - u64 ei_last; + u64 addr; + u64 ei_start, ei_last; if (ei->type != E820_RAM) continue; - addr = round_up(ei->addr, align); + ei_last = ei->addr + ei->size; - if (addr < start) - addr = round_up(start, align); - if (addr >= ei_last) - continue; - *sizep = ei_last - addr; - while (bad_addr_size(&addr, sizep, align) && - addr + *sizep <= ei_last) - ; - last = addr + *sizep; - if (last > ei_last) + ei_start = ei->addr; + addr = find_early_area_size(ei_start, ei_last, start, + sizep, align); + + if (addr == -1ULL) continue; + return addr; } -- 1.6.4.2 -- 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/
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