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| 1 | +/* SPDX-License-Identifier: GPL-2.0-only */ |
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1 | 2 | /* |
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2 | 3 | * net busy poll support |
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3 | 4 | * Copyright(c) 2013 Intel Corporation. |
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4 | | - * |
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5 | | - * This program is free software; you can redistribute it and/or modify it |
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6 | | - * under the terms and conditions of the GNU General Public License, |
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7 | | - * version 2, as published by the Free Software Foundation. |
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8 | | - * |
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9 | | - * This program is distributed in the hope it will be useful, but WITHOUT |
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10 | | - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 | | - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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12 | | - * more details. |
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13 | | - * |
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14 | | - * You should have received a copy of the GNU General Public License along with |
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15 | | - * this program; if not, write to the Free Software Foundation, Inc., |
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16 | | - * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
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17 | 5 | * |
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18 | 6 | * Author: Eliezer Tamir |
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19 | 7 | * |
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.. | .. |
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43 | 31 | |
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44 | 32 | static inline bool net_busy_loop_on(void) |
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45 | 33 | { |
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46 | | - return sysctl_net_busy_poll; |
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| 34 | + return READ_ONCE(sysctl_net_busy_poll); |
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47 | 35 | } |
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48 | 36 | |
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49 | 37 | static inline bool sk_can_busy_loop(const struct sock *sk) |
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.. | .. |
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126 | 114 | struct napi_struct *napi) |
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127 | 115 | { |
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128 | 116 | #ifdef CONFIG_NET_RX_BUSY_POLL |
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129 | | - skb->napi_id = napi->napi_id; |
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| 117 | + /* If the skb was already marked with a valid NAPI ID, avoid overwriting |
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| 118 | + * it. |
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| 119 | + */ |
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| 120 | + if (skb->napi_id < MIN_NAPI_ID) |
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| 121 | + skb->napi_id = napi->napi_id; |
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130 | 122 | #endif |
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131 | 123 | } |
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132 | 124 | |
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