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305b152325
Implement write protection for kernel modules text and read-only data sections by implementing set_memory_[ro|rw] on s390. Since s390 has no execute bit in the pte's NX is not supported. set_memory_[ro|rw] will only work on normal pages and not on large pages, so in case a large page should be modified bail out with a warning. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
16 lines
434 B
C
16 lines
434 B
C
#ifndef _S390_CACHEFLUSH_H
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#define _S390_CACHEFLUSH_H
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/* Caches aren't brain-dead on the s390. */
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#include <asm-generic/cacheflush.h>
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#ifdef CONFIG_DEBUG_PAGEALLOC
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void kernel_map_pages(struct page *page, int numpages, int enable);
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#endif
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int set_memory_ro(unsigned long addr, int numpages);
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int set_memory_rw(unsigned long addr, int numpages);
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int set_memory_nx(unsigned long addr, int numpages);
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#endif /* _S390_CACHEFLUSH_H */
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