On 02/21/2018 05:55 PM, Ram Pai wrote:
+static inline u32 pkey_to_shift(int pkey) +{
- return pkey * PKEY_BITS_PER_PKEY;
+}
pkey_bit_position(), perhaps?
+static inline pkey_reg_t reset_bits(int pkey, pkey_reg_t bits) +{
- u32 shift = pkey_to_shift(pkey);
- return ~(bits << shift);
+}
I'd prefer clear_pkey_flags() or maybe clear_pkey_bits(). "reset" can mean "reset to 0" or "reset to 1".
Also, why the u32 here? Isn't an int more appropriate?
+static inline pkey_reg_t left_shift_bits(int pkey, pkey_reg_t bits) +{
- u32 shift = pkey_to_shift(pkey);
- return (bits << shift);
+}
+static inline pkey_reg_t right_shift_bits(int pkey, pkey_reg_t bits) +{
- u32 shift = pkey_to_shift(pkey);
- return (bits >> shift);
+}
Some comments on these would be handy. Basically that this takes a per-key flags value and puts it at the right position so it can be shoved in the register. -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html