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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2016-06-20 15:03:38 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-06-28 10:32:33 +0300 |
| commit | 7b4ff87cbf3d2530d6362bb08cc61635894f596c (patch) | |
| tree | 623e086fcd1d6b03e81d47afeef3098c05bc2f58 /drivers/s390/cio/cmf.c | |
| parent | 7b411ac6b755b211423dfd37c59a7dad5a5e0bf1 (diff) | |
| download | linux-7b4ff87cbf3d2530d6362bb08cc61635894f596c.tar.xz | |
s390/cio: use basic blocks for cmf inline assemblies
Use only simple inline assemblies which consist of a single basic
block if the register asm construct is being used.
Otherwise gcc would generate broken code if the compiler option
--sanitize-coverage=trace-pc would be used.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/cmf.c')
| -rw-r--r-- | drivers/s390/cio/cmf.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/s390/cio/cmf.c b/drivers/s390/cio/cmf.c index b2afad5a5682..f18c83bacb09 100644 --- a/drivers/s390/cio/cmf.c +++ b/drivers/s390/cio/cmf.c @@ -164,6 +164,9 @@ static inline u64 time_to_avg_nsec(u32 value, u32 count) return ret; } +#define CMF_OFF 0 +#define CMF_ON 2 + /* * Activate or deactivate the channel monitor. When area is NULL, * the monitor is deactivated. The channel monitor needs to @@ -176,7 +179,7 @@ static inline void cmf_activate(void *area, unsigned int onoff) register long __gpr1 asm("1"); __gpr2 = area; - __gpr1 = onoff ? 2 : 0; + __gpr1 = onoff; /* activate channel measurement */ asm("schm" : : "d" (__gpr2), "d" (__gpr1) ); } @@ -587,7 +590,7 @@ static int alloc_cmb(struct ccw_device *cdev) /* everything ok */ memset(mem, 0, size); cmb_area.mem = mem; - cmf_activate(cmb_area.mem, 1); + cmf_activate(cmb_area.mem, CMF_ON); } } @@ -621,7 +624,7 @@ static void free_cmb(struct ccw_device *cdev) if (list_empty(&cmb_area.list)) { ssize_t size; size = sizeof(struct cmb) * cmb_area.num_channels; - cmf_activate(NULL, 0); + cmf_activate(NULL, CMF_OFF); free_pages((unsigned long)cmb_area.mem, get_order(size)); cmb_area.mem = NULL; } @@ -830,7 +833,7 @@ static int alloc_cmbe(struct ccw_device *cdev) /* activate global measurement if this is the first channel */ if (list_empty(&cmb_area.list)) - cmf_activate(NULL, 1); + cmf_activate(NULL, CMF_ON); list_add_tail(&cdev->private->cmb_list, &cmb_area.list); spin_unlock_irq(cdev->ccwlock); @@ -867,7 +870,7 @@ static void free_cmbe(struct ccw_device *cdev) /* deactivate global measurement if this is the last channel */ list_del_init(&cdev->private->cmb_list); if (list_empty(&cmb_area.list)) - cmf_activate(NULL, 0); + cmf_activate(NULL, CMF_OFF); spin_unlock_irq(cdev->ccwlock); spin_unlock(&cmb_area.lock); } @@ -1321,7 +1324,7 @@ void cmf_reactivate(void) { spin_lock(&cmb_area.lock); if (!list_empty(&cmb_area.list)) - cmf_activate(cmb_area.mem, 1); + cmf_activate(cmb_area.mem, CMF_ON); spin_unlock(&cmb_area.lock); } |