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x86, boot: align the .bss section in the decompressor

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Aligning the .bss section makes it trivial to use large operation
sizes for moving the initialized sections and clearing the .bss.
The alignment chosen (L1 cache) is somewhat arbitrary, but should be
large enough to avoid all known performance traps and small enough to
not cause troubles.

[ Impact: trivial performance enhancement, future patch prep	]

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2009-04-30 17:59:36 -07:00
parent 83c4832683
commit 0b4eb462da
1 changed files with 1 additions and 0 deletions
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1
arch/x86/boot/compressed/vmlinux.lds.S
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@ -42,6 +42,7 @@ SECTIONS
*(.data.*)
_edata = . ;
}
. = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
.bss : {
_bss = . ;
*(.bss)