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/linux-4.4.14/Documentation/
Dfutex-requeue-pi.txt1 Futex Requeue PI
4 Requeueing of tasks from a non-PI futex to a PI futex requires
6 left without an owner if it has waiters; doing so would break the PI
10 "PI".
50 previously mentioned PI-boosting algorithms.
52 In order to support PI-aware pthread_condvar's, the kernel needs to
53 be able to requeue tasks to PI futexes. This support implies that
55 user space already holding the PI futex. The glibc implementation
80 The actual glibc implementation will likely test for PI and make the
82 calls for the PI cases. Similar changes are needed for
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Dpi-futex.txt1 Lightweight PI-futexes
6 - in the user-space fastpath a PI-enabled futex involves no kernel work
7 (or any other PI complexity) at all. No registration, no extra kernel
13 - the in-kernel PI implementation is streamlined around the mutex
22 The short reply: user-space PI helps achieving/improving determinism for
24 determinism and well-bound latencies. Even in the worst-case, PI will
65 Currently (without PI), if a high-prio and a low-prio task shares a lock
77 As mentioned before, the userspace fastpath of PI-enabled pthread
93 own TID into the futex value], and attaches a 'PI state' structure to
94 the futex-queue. The pi_state includes an rt-mutex, which is a PI-aware,
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D00-INDEX199 - info on requeueing of tasks from a non-PI futex to a PI futex
DCodingStyle20 characters deep, and that is akin to trying to define the value of PI to
/linux-4.4.14/arch/m68k/fpsp040/
Dstan.S83 |--N*PI/2, -32 <= N <= 32, IN A LEADING TERM IN EXT. AND TRAILING
84 |--TERM IN SGL. NOTE THAT PI IS 64-BIT LONG, THUS N*PI/2 IS AT
181 cmpil #0x4004BC7E,%d0 | ...|X| < 15 PI?
187 |--THIS IS THE USUAL CASE, |X| <= 15 PI.
190 fmuld TWOBYPI,%fp1 | ...X*2/PI
193 leal PITBL+0x200,%a1 | ...TABLE OF N*PI/2, N = -32,...,32
292 |--IF |X| > 15PI, WE USE THE GENERAL ARGUMENT REDUCTION.
322 | ;create 2**16383*PI/2
327 | ;PI/2 at FP_SCR3
340 |--ON ENTRY, FP0 IS X, ON RETURN, FP0 IS X REM PI/2, |X| <= PI/4.
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Dsacos.S48 PI: .long 0x40000000,0xC90FDAA2,0x2168C235,0x00000000 label
57 |--ACOS(X) = PI/2 FOR DENORMALIZED X
Dssin.S194 cmpil #0x4004BC7E,%d0 | ...|X| < 15 PI?
199 |--THIS IS THE USUAL CASE, |X| <= 15 PI.
202 fmuld TWOBYPI,%fp1 | ...X*2/PI
205 lea PITBL+0x200,%a1 | ...TABLE OF N*PI/2, N = -32,...,32
459 addil #0x00003FFF,%d2 | ...BIASED EXPO OF 2**L * (PI/2)
548 cmpil #0x4004BC7E,%d0 | ...|X| < 15 PI?
554 |--THIS IS THE USUAL CASE, |X| <= 15 PI.
557 fmuld TWOBYPI,%fp1 | ...X*2/PI
560 lea PITBL+0x200,%a1 | ...TABLE OF N*PI/2, N = -32,...,32
Ddo_func.S57 PPIBY2: .long 0x3FFF0000,0xC90FDAA2,0x2168C235 |+PI/2
58 MPIBY2: .long 0xbFFF0000,0xC90FDAA2,0x2168C235 |-PI/2
504 |**Returns +PI/2
510 |**Returns -PI/2
Dsasin.S92 |--|X| = 1, ASIN(X) = +- PI/2.
Dsatan.S402 |--IF |X| > 2^(100), RETURN SIGN(X)*(PI/2 - TINY). OTHERWISE,
403 |--RETURN SIGN(X)*PI/2 + ATAN(-1/X).
/linux-4.4.14/drivers/scsi/pm8001/
Dpm8001_defs.h100 #define PI (OB + PM8001_MAX_SPCV_OUTB_NUM) macro
101 #define USI_MAX_MEMCNT (PI + PM8001_MAX_SPCV_OUTB_NUM)
Dpm8001_init.c305 pm8001_ha->memoryMap.region[PI+i].num_elements = 1; in pm8001_alloc()
306 pm8001_ha->memoryMap.region[PI+i].element_size = 4; in pm8001_alloc()
307 pm8001_ha->memoryMap.region[PI+i].total_len = 4; in pm8001_alloc()
308 pm8001_ha->memoryMap.region[PI+i].alignment = 4; in pm8001_alloc()
Dpm80xx_hwi.c532 pm8001_ha->memoryMap.region[PI + i].phys_addr_hi; in init_default_table_values()
534 pm8001_ha->memoryMap.region[PI + i].phys_addr_lo; in init_default_table_values()
538 pm8001_ha->memoryMap.region[PI + i].virt_ptr; in init_default_table_values()
Dpm8001_hwi.c260 pm8001_ha->memoryMap.region[PI + i].phys_addr_hi; in init_default_table_values()
262 pm8001_ha->memoryMap.region[PI + i].phys_addr_lo; in init_default_table_values()
266 pm8001_ha->memoryMap.region[PI + i].virt_ptr; in init_default_table_values()
/linux-4.4.14/Documentation/locking/
Drt-mutex-design.txt16 inheritance (PI) algorithm that is used, as well as reasons for the
17 decisions that were made to implement PI in the manner that was done.
57 Priority Inheritance (PI)
61 for this document. Here we only discuss PI.
63 PI is where a process inherits the priority of another process if the other
76 the design that is used to implement PI.
78 PI chain - The PI chain is an ordered series of locks and processes that cause
84 PI and spin locks that are used in the PI code, from now on
85 the PI locks will be called a mutex.
88 referring to spin locks that are used to protect parts of the PI
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Drt-mutex.txt1 RT-mutex subsystem with PI support
4 RT-mutexes with priority inheritance are used to support PI-futexes,
7 about PI-futexes.]
D00-INDEX12 - desc. of RT-mutex subsystem with PI (Priority Inheritance) support.
/linux-4.4.14/Documentation/devicetree/bindings/powerpc/nintendo/
Dgamecube.txt25 1.b) The Processor Interface (PI) node
33 - reg : should contain the PI registers location and length
39 the PI node.
Dwii.txt34 1.b) The Processor Interface (PI) node
42 - reg : should contain the PI registers location and length
48 the PI node.
/linux-4.4.14/arch/arm/boot/dts/
Dcros-adc-thermistors.dtsi6 * Exynos5800 based Peach PI.
Dsun7i-a20-i12-tvbox.dts97 /* This controls VCC-PI, must be always on! */
/linux-4.4.14/drivers/net/wireless/realtek/rtl818x/
DKconfig27 TrendNET TEW-288PI
/linux-4.4.14/Documentation/scheduler/
Dsched-rt-group.txt177 the biggest challenge as the current linux PI infrastructure is geared towards
182 This means the whole PI machinery will have to be reworked - and that is one of
/linux-4.4.14/Documentation/video4linux/
Dsi476x.txt181 0x30 | rdspi | RDS PI code
Dsi4713.txt123 rds_pi - Sets the RDS PI field for transmission.
/linux-4.4.14/arch/m68k/ifpsp060/src/
Dfpsp.S5298 #--IF |X| > 15PI, WE USE THE GENERAL ARGUMENT REDUCTION.
5357 cmp.l %d1,&0x4004BC7E # |X| < 15 PI?
5362 #--THIS IS THE USUAL CASE, |X| <= 15 PI.
5367 fmul.d TWOBYPI(%pc),%fp1 # X*2/PI
5369 lea PITBL+0x200(%pc),%a1 # TABLE OF N*PI/2, N = -32,...,32
5583 # yes; create 2**16383*PI/2
5588 # create low half of 2**16383*PI/2 at FP_SCR1
5605 #--ON ENTRY, FP0 IS X, ON RETURN, FP0 IS X REM PI/2, |X| <= PI/4.
5625 #--FIND THE REMAINDER OF (R,r) W.R.T. 2**L * (PI/2). L IS SO CHOSEN
5626 #--THAT INT( X * (2/PI) / 2**(L) ) < 2**29.
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Dfplsp.S552 PI: long 0x40000000,0xC90FDAA2,0x2168C235,0x00000000 label
5041 cmp.l %d1,&0x4004BC7E # is |X| < 15 PI?
5045 #--THIS IS THE USUAL CASE, |X| <= 15 PI.
5049 fmul.d TWOBYPI(%pc),%fp1 # X*2/PI
5051 lea PITBL+0x200(%pc),%a1 # TABLE OF N*PI/2, N = -32,...,32
5552 add.l &0x00003FFF,%d2 # BIASED EXP OF 2**L * (PI/2)
5681 #--N*PI/2, -32 <= N <= 32, IN A LEADING TERM IN EXT. AND TRAILING
5682 #--TERM IN SGL. NOTE THAT PI IS 64-BIT LONG, THUS N*PI/2 IS AT
5770 cmp.l %d1,&0x4004BC7E # |X| < 15 PI?
5775 #--THIS IS THE USUAL CASE, |X| <= 15 PI.
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/linux-4.4.14/drivers/net/hamradio/
DKconfig57 Currently, this driver supports Ottawa PI/PI2, Paccomm/Gracilis
/linux-4.4.14/Documentation/ABI/testing/
Dsysfs-block61 integrity metadata. Set if the device is T10 PI-capable.
/linux-4.4.14/drivers/isdn/hardware/eicon/
Ddivacapi.h698 #define PI 0x1E /* Progress Indicator */ macro
Dmessage.c4872 word multi_pi_id[] = {1, PI}; in sig_ind()
5088 force_mt_info |= SendMultiIE(plci, Id, multi_pi_parms, PI, 0x210, 0); in sig_ind()
5752 SendMultiIE(plci, Id, multi_pi_parms, PI, 0x210, true)); in sig_ind()
/linux-4.4.14/sound/pci/
Dintel8x0.c133 DEFINE_REGSET(PI, 0x00); /* PCM in */