Messages in this thread Patch in this message | | | From | Jeremy Fitzhardinge <> | Subject | [PATCH 11/12] x86/fixmap: add a predicate for usermode fixmaps | Date | Wed, 14 Oct 2009 12:28:35 -0700 |
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Some set of fixmaps are intented to be mapped into usermode. Add a predicate to test for those fixmaps.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> --- arch/x86/include/asm/fixmap.h | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h index b15c865..026ee10 100644 --- a/arch/x86/include/asm/fixmap.h +++ b/arch/x86/include/asm/fixmap.h @@ -183,6 +183,24 @@ static inline void __set_fixmap(enum fixed_addresses idx, extern void __this_fixmap_does_not_exist(void); +static inline bool user_fixmap(enum fixed_addresses fixmap) +{ + switch (fixmap) { +#ifdef CONFIG_X86_32 + case FIX_HOLE ... FIX_VDSO: +#else + case VSYSCALL_LAST_PAGE ... VSYSCALL_HPET: +#ifdef CONFIG_PARAVIRT_CLOCK_VSYSCALL + case FIX_PVCLOCK_TIME_INFO: +#endif +#endif + return true; + + default: + return false; + } +} + /* * 'index to address' translation. If anyone tries to use the idx * directly without translation, we catch the bug with a NULL-deference -- 1.6.2.5
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