diff options
-rw-r--r-- | fs/ioprio.c | 23 | ||||
-rw-r--r-- | include/linux/ioprio.h | 23 |
2 files changed, 24 insertions, 22 deletions
diff --git a/fs/ioprio.c b/fs/ioprio.c index 06578311c63f..78b1deae3fa2 100644 --- a/fs/ioprio.c +++ b/fs/ioprio.c | |||
@@ -140,6 +140,29 @@ out: | |||
140 | return ret; | 140 | return ret; |
141 | } | 141 | } |
142 | 142 | ||
143 | int ioprio_best(unsigned short aprio, unsigned short bprio) | ||
144 | { | ||
145 | unsigned short aclass = IOPRIO_PRIO_CLASS(aprio); | ||
146 | unsigned short bclass = IOPRIO_PRIO_CLASS(bprio); | ||
147 | |||
148 | if (!ioprio_valid(aprio)) | ||
149 | return bprio; | ||
150 | if (!ioprio_valid(bprio)) | ||
151 | return aprio; | ||
152 | |||
153 | if (aclass == IOPRIO_CLASS_NONE) | ||
154 | aclass = IOPRIO_CLASS_BE; | ||
155 | if (bclass == IOPRIO_CLASS_NONE) | ||
156 | bclass = IOPRIO_CLASS_BE; | ||
157 | |||
158 | if (aclass == bclass) | ||
159 | return min(aprio, bprio); | ||
160 | if (aclass > bclass) | ||
161 | return bprio; | ||
162 | else | ||
163 | return aprio; | ||
164 | } | ||
165 | |||
143 | asmlinkage long sys_ioprio_get(int which, int who) | 166 | asmlinkage long sys_ioprio_get(int which, int who) |
144 | { | 167 | { |
145 | struct task_struct *g, *p; | 168 | struct task_struct *g, *p; |
diff --git a/include/linux/ioprio.h b/include/linux/ioprio.h index 88d5961f7a3f..8e2042b9d471 100644 --- a/include/linux/ioprio.h +++ b/include/linux/ioprio.h | |||
@@ -59,27 +59,6 @@ static inline int task_nice_ioprio(struct task_struct *task) | |||
59 | /* | 59 | /* |
60 | * For inheritance, return the highest of the two given priorities | 60 | * For inheritance, return the highest of the two given priorities |
61 | */ | 61 | */ |
62 | static inline int ioprio_best(unsigned short aprio, unsigned short bprio) | 62 | extern int ioprio_best(unsigned short aprio, unsigned short bprio); |
63 | { | ||
64 | unsigned short aclass = IOPRIO_PRIO_CLASS(aprio); | ||
65 | unsigned short bclass = IOPRIO_PRIO_CLASS(bprio); | ||
66 | |||
67 | if (!ioprio_valid(aprio)) | ||
68 | return bprio; | ||
69 | if (!ioprio_valid(bprio)) | ||
70 | return aprio; | ||
71 | |||
72 | if (aclass == IOPRIO_CLASS_NONE) | ||
73 | aclass = IOPRIO_CLASS_BE; | ||
74 | if (bclass == IOPRIO_CLASS_NONE) | ||
75 | bclass = IOPRIO_CLASS_BE; | ||
76 | |||
77 | if (aclass == bclass) | ||
78 | return min(aprio, bprio); | ||
79 | if (aclass > bclass) | ||
80 | return bprio; | ||
81 | else | ||
82 | return aprio; | ||
83 | } | ||
84 | 63 | ||
85 | #endif | 64 | #endif |