forked from Minki/linux
s390/mm: fix mapping of read-only kernel text section
Within the identity mapping the kernel text section is mapped read-only. However when mapping the first and last page of the text section we must round upwards and downwards respectively, if only parts of a page belong to the section. Otherwise potential rw data can be mapped read-only. So the rounding must be done just the other way we have it right now. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -331,8 +331,8 @@ void __init vmem_map_init(void)
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unsigned long start, end;
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int i;
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ro_start = ((unsigned long)&_stext) & PAGE_MASK;
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ro_end = PFN_ALIGN((unsigned long)&_eshared);
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ro_start = PFN_ALIGN((unsigned long)&_stext);
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ro_end = (unsigned long)&_eshared & PAGE_MASK;
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for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
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if (memory_chunk[i].type == CHUNK_CRASHK ||
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memory_chunk[i].type == CHUNK_OLDMEM)
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