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authorLennert Buytenhek <buytenh@org.rmk.(none)>2006-09-29 22:14:05 +0200
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-09-30 12:30:44 +0200
commit2552fc27ff79b10b9678d92bcaef21df38bb7bb6 (patch)
treec69faf46c3df7f9260f33ea7e562bebee6854766 /fs/fs-writeback.c
parent[ARM] Fix XIP_KERNEL build error in arch/arm/mm/mmu.c (diff)
downloadlinux-2552fc27ff79b10b9678d92bcaef21df38bb7bb6.tar.xz
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[ARM] 3809/3: get rid of 4 megabyte kernel image size limit
We currently have a hardcoded 4 megabyte uncompressed kernel image size limit, which is easily exceeded by, for example, enabling some of the various kernel debugging options. When setting up the initial page tables (which is where this 4M limit is hardcoded), it's actually relatively easy to find out the true size of the uncompressed kernel image and create enough page table entries for things to fit, so this patch makes it so. In the decompressor, we also need to know the size of the uncompressed kernel image, to figure out whether there is any chance that uncompressing the kernel might overwrite the compressed kernel image stored elsewhere in memory. We don't have that info at this boot stage, though, so we approximate the size of the uncompressed kernel by taking the compressed kernel image size and allowing for a maximum 4x expansion. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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