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powerpc/64s/exception: reduce page fault unnecessary loads

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This avoids 3 loads in the radix page fault case, 1 load in the
hash fault case, and 2 loads in the hash miss page fault case.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190802105709.27696-37-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin
2019-08-02 20:57:01 +10:00
committed by Michael Ellerman
parent 05f97d94dd
commit 9b123d1ea2
2 changed files with 19 additions and 23 deletions
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4
arch/powerpc/mm/book3s64/hash_utils.c
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@ -1462,8 +1462,8 @@ int hash_page(unsigned long ea, unsigned long access, unsigned long trap,
}
EXPORT_SYMBOL_GPL(hash_page);
int __hash_page(unsigned long ea, unsigned long msr, unsigned long trap,
unsigned long dsisr)
int __hash_page(unsigned long trap, unsigned long ea, unsigned long dsisr,
unsigned long msr)
{
unsigned long access = _PAGE_PRESENT | _PAGE_READ;
unsigned long flags = 0;