• Thomas Gleixner's avatar
    x86/tlb: Drop the _GPL from the cpu_tlbstate export · 1e547681
    Thomas Gleixner authored
    The recent changes for PTI touch cpu_tlbstate from various tlb_flush
    inlines. cpu_tlbstate is exported as GPL symbol, so this causes a
    regression when building out of tree drivers for certain graphics cards.
    
    Aside of that the export was wrong since it was introduced as it should
    have been EXPORT_PER_CPU_SYMBOL_GPL().
    
    Use the correct PER_CPU export and drop the _GPL to restore the previous
    state which allows users to utilize the cards they payed for.
    
    As always I'm really thrilled to make this kind of change to support the
    #friends (or however the hot hashtag of today is spelled) from that closet
    sauce graphics corp.
    
    Fixes: 1e02ce4c ("x86: Store a per-cpu shadow copy of CR4")
    Fixes: 6fd166aa ("x86/mm: Use/Fix PCID to optimize user/kernel switches")
    Reported-by: default avatarKees Cook <keescook@google.com>
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: stable@vger.kernel.org
    1e547681
init.c 25.2 KB