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| author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2010-11-10 09:05:55 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-11-10 09:05:54 (GMT) |
| commit | ec6743bb06510c7b629603ce35713d6ae9273579 (patch) | |
| tree | 6faddd2ca7b991987bafc2a7d4241ad6d141b765 /arch/s390/include | |
| parent | ca768b663131ca644689fcadc9ca092dcc96a758 (diff) | |
| download | linux-ec6743bb06510c7b629603ce35713d6ae9273579.tar.xz | |
[S390] mm: add devmem_is_allowed() for STRICT_DEVMEM checking
Provide the devmem_is_allowed() routine to restrict access to
kernel memory from userspace.
Set the CONFIG_STRICT_DEVMEM config option to switch on checking.
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/page.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index a8729ea..3c987e9 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -130,6 +130,11 @@ struct page; void arch_free_page(struct page *page, int order); void arch_alloc_page(struct page *page, int order); +static inline int devmem_is_allowed(unsigned long pfn) +{ + return 0; +} + #define HAVE_ARCH_FREE_PAGE #define HAVE_ARCH_ALLOC_PAGE |