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    SubjectRe: [PATCH] ARM: cache-v7: Disable preemption when reading CCSIDR
    On Thu, 2 Feb 2012, Russell King - ARM Linux wrote:

    > On Thu, Feb 02, 2012 at 11:24:46AM -0800, Stephen Boyd wrote:
    > > Should we move get_thread_info into assembler.h? It seems odd
    > > to include entry-header.S but I saw that vfp was doing the same.
    >
    > Probably yes, and probably also have preempt_disable and preempt_enable
    > assembler macros. That's going to get rather icky if we have to
    > explicitly call the scheduler though (to solve (1)).

    What about a pair of helpers written in C instead?

    v7_flush_dcache_all() could be renamed, and a wrapper function called
    v7_flush_dcache_all() would call the preemption disable helper, call the
    former v7_flush_dcache_all code, then call the preemption enable helper.

    Then __v7_setup() could still call the core cache flush code without
    issues.


    Nicolas


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