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authorThomas Gleixner <tglx@linutronix.de>2018-01-04 22:19:04 +0100
committerThomas Gleixner <tglx@linutronix.de>2018-01-05 00:39:58 +0100
commit1e5476815fd7f98b888e01a0f9522b63085f96c9 (patch)
tree1c05ffeeba8b8e6c3058b8dcb88646b186ea8433 /arch
parentx86/events/intel/ds: Use the proper cache flush method for mapping ds buffers (diff)
downloadlinux-1e5476815fd7f98b888e01a0f9522b63085f96c9.tar.xz
linux-1e5476815fd7f98b888e01a0f9522b63085f96c9.zip
x86/tlb: Drop the _GPL from the cpu_tlbstate export
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: 1e02ce4cccdc ("x86: Store a per-cpu shadow copy of CR4") Fixes: 6fd166aae78c ("x86/mm: Use/Fix PCID to optimize user/kernel switches") Reported-by: Kees Cook <keescook@google.com> Signed-off-by: Thomas 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
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/mm/init.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 80259ad8c386..6b462a472a7b 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -870,7 +870,7 @@ __visible DEFINE_PER_CPU_SHARED_ALIGNED(struct tlb_state, cpu_tlbstate) = {
.next_asid = 1,
.cr4 = ~0UL, /* fail hard if we screw up cr4 shadow initialization */
};
-EXPORT_SYMBOL_GPL(cpu_tlbstate);
+EXPORT_PER_CPU_SYMBOL(cpu_tlbstate);
void update_cache_mode_entry(unsigned entry, enum page_cache_mode cache)
{