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The page fault handler (__do_page_fault()) basically has two sections: one for handling faults in the kernel portion of the address space and another for faults in the user portion of the address space. But, these two parts don't stick out that well. Let's make that more clear from code separation and naming. Pull kernel fault handling into its own helper, and reflect that naming by renaming spurious_fault() -> spurious_kernel_fault(). Also, rewrite the vmalloc() handling comment a bit. It was a bit stale and also glossed over the reserved bit handling. Cc: x86@kernel.org Cc: Jann Horn <jannh@google.com> Cc: Sean Christopherson <sean.j.christopherson@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180928160222.401F4E10@viggo.jf.intel.com |
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