Date: Sun, 25 Feb 2018 10:18:02 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r329953 - in stable/11/sys/compat/linuxkpi/common: include/linux src Message-ID: <201802251018.w1PAI2e6007280@repo.freebsd.org>
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Author: hselasky Date: Sun Feb 25 10:18:02 2018 New Revision: 329953 URL: https://svnweb.freebsd.org/changeset/base/329953 Log: MFC r329376: Implement tasklet_enable() and tasklet_disable() in the LinuxKPI. Requested by: Johannes Lundberg <johalun0@gmail.com> Sponsored by: Mellanox Technologies Modified: stable/11/sys/compat/linuxkpi/common/include/linux/interrupt.h stable/11/sys/compat/linuxkpi/common/src/linux_tasklet.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/compat/linuxkpi/common/include/linux/interrupt.h ============================================================================== --- stable/11/sys/compat/linuxkpi/common/include/linux/interrupt.h Sun Feb 25 10:15:52 2018 (r329952) +++ stable/11/sys/compat/linuxkpi/common/include/linux/interrupt.h Sun Feb 25 10:18:02 2018 (r329953) @@ -200,5 +200,7 @@ extern void tasklet_schedule(struct tasklet_struct *); extern void tasklet_kill(struct tasklet_struct *); extern void tasklet_init(struct tasklet_struct *, tasklet_func_t *, unsigned long data); +extern void tasklet_enable(struct tasklet_struct *); +extern void tasklet_disable(struct tasklet_struct *); #endif /* _LINUX_INTERRUPT_H_ */ Modified: stable/11/sys/compat/linuxkpi/common/src/linux_tasklet.c ============================================================================== --- stable/11/sys/compat/linuxkpi/common/src/linux_tasklet.c Sun Feb 25 10:15:52 2018 (r329952) +++ stable/11/sys/compat/linuxkpi/common/src/linux_tasklet.c Sun Feb 25 10:18:02 2018 (r329953) @@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$"); #define TASKLET_ST_BUSY 1 #define TASKLET_ST_EXEC 2 #define TASKLET_ST_LOOP 3 +#define TASKLET_ST_PAUSED 4 #define TASKLET_ST_CMPSET(ts, old, new) \ atomic_cmpset_ptr((volatile uintptr_t *)&(ts)->entry.tqe_prev, old, new) @@ -195,4 +196,22 @@ tasklet_kill(struct tasklet_struct *ts) /* wait until tasklet is no longer busy */ while (TASKLET_ST_GET(ts) != TASKLET_ST_IDLE) pause("W", 1); +} + +void +tasklet_enable(struct tasklet_struct *ts) +{ + (void) TASKLET_ST_CMPSET(ts, TASKLET_ST_PAUSED, TASKLET_ST_IDLE); +} + +void +tasklet_disable(struct tasklet_struct *ts) +{ + while (1) { + if (TASKLET_ST_GET(ts) == TASKLET_ST_PAUSED) + break; + if (TASKLET_ST_CMPSET(ts, TASKLET_ST_IDLE, TASKLET_ST_PAUSED)) + break; + pause("W", 1); + } }
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