search for: do_div

From: Thierry Reding <treding at nvidia.com> The semantics of do_div() are (see include/asm-generic/div64.h): uint32_t do_div(uint64_t *n, uint32_t base) Using a different type will therefore cause the following warning (as seen on xtensa/allmodconfig): CC [M] drivers/gpu/drm/nouveau/core/subdev/clock/gk20a.o In file included from arch/xtensa/include/genera...

...ouveau/nouveau_bo.c index 34a998012bf6..cdacfe1f732c 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -143,14 +143,6 @@ nouveau_bo_del_ttm(struct ttm_buffer_object *bo) kfree(nvbo); } -static inline u64 -roundup_64(u64 x, u32 y) -{ - x += y - 1; - do_div(x, y); - return x * y; -} - static void nouveau_bo_fixup_align(struct nouveau_bo *nvbo, u32 flags, int *align, u64 *size) diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h index edbd5a210df2..13de9d49bd52 100644 --- a/fs/xfs/xfs_linux.h +++ b/fs/xfs/xfs_linux.h @@ -207,13 +207,6 @@ s...

While digging through the time code, I found something very strange in do_settime: x = (secs * 1000000000ULL) + (u64)nsecs - system_time_base; y = do_div(x, 1000000000); spin_lock(&wc_lock); wc_sec = _wc_sec = (u32)x; wc_nsec = _wc_nsec = (u32)y; spin_unlock(&wc_lock); The value "x" appears to be the number of nanoseconds, while the value "y" is the value in seconds. The assignments to wc_sec and wc_...

...{ uint32_t eax, ebx, ecx, edx; @@ -57,35 +59,32 @@ static inline int __vmware_platform(void) static unsigned long vmware_get_tsc_khz(void) { - uint64_t tsc_hz, lpj; - uint32_t eax, ebx, ecx, edx; - - VMWARE_PORT(GETHZ, eax, ebx, ecx, edx); - - tsc_hz = eax | (((uint64_t)ebx) << 32); - do_div(tsc_hz, 1000); - BUG_ON(tsc_hz >> 32); - pr_info("TSC freq read from hypervisor : %lu.%03lu MHz\n", - (unsigned long) tsc_hz / 1000, - (unsigned long) tsc_hz % 1000); - - if (!preset_lpj) { - lpj = ((u64)tsc_hz * 1000); - do_div(lpj, HZ); - preset_lpj = lpj; - } - - return...

...{ uint32_t eax, ebx, ecx, edx; @@ -57,35 +59,32 @@ static inline int __vmware_platform(void) static unsigned long vmware_get_tsc_khz(void) { - uint64_t tsc_hz, lpj; - uint32_t eax, ebx, ecx, edx; - - VMWARE_PORT(GETHZ, eax, ebx, ecx, edx); - - tsc_hz = eax | (((uint64_t)ebx) << 32); - do_div(tsc_hz, 1000); - BUG_ON(tsc_hz >> 32); - pr_info("TSC freq read from hypervisor : %lu.%03lu MHz\n", - (unsigned long) tsc_hz / 1000, - (unsigned long) tsc_hz % 1000); - - if (!preset_lpj) { - lpj = ((u64)tsc_hz * 1000); - do_div(lpj, HZ); - preset_lpj = lpj; - } - - return...

...MI_PERIODIC, return the corresponding + * cycle counter. */ + return flags & VMI_ALARM_COUNTER_MASK; +} + +/* paravirt_ops.get_wallclock = vmi_get_wallclock */ +unsigned long vmi_get_wallclock(void) +{ + unsigned long long wallclock; + wallclock = vmi_timer_ops.get_wallclock(); // nsec + (void)do_div(wallclock, 1000000000); // sec + + return wallclock; +} + +/* paravirt_ops.set_wallclock = vmi_set_wallclock */ +int vmi_set_wallclock(unsigned long now) +{ + return 0; +} + +/* paravirt_ops.get_scheduled_cycles = vmi_get_sched_cycles */ +unsigned long long vmi_get_sched_cycles(void) +{ + ret...

...MI_PERIODIC, return the corresponding + * cycle counter. */ + return flags & VMI_ALARM_COUNTER_MASK; +} + +/* paravirt_ops.get_wallclock = vmi_get_wallclock */ +unsigned long vmi_get_wallclock(void) +{ + unsigned long long wallclock; + wallclock = vmi_timer_ops.get_wallclock(); // nsec + (void)do_div(wallclock, 1000000000); // sec + + return wallclock; +} + +/* paravirt_ops.set_wallclock = vmi_set_wallclock */ +int vmi_set_wallclock(unsigned long now) +{ + return 0; +} + +/* paravirt_ops.get_scheduled_cycles = vmi_get_sched_cycles */ +unsigned long long vmi_get_sched_cycles(void) +{ + ret...

In a multi device setup, the chunk allocator currently always allocates chunks on the devices in the same order. This leads to a very uneven distribution, especially with RAID1 or RAID10 and an uneven number of devices. This patch always sorts the devices before allocating, and allocates the stripes on the devices with the most available space, as long as there is enough space available. In a low

...u32 remainder = 0, sf_cap, exp; > char tmp[8]; > + const char *unit; > > tmp[0] = '\0'; > i = 0; > - if (size >= divisor[units]) { > - while (size >= divisor[units]) { > - remainder = do_div(size, divisor[units]); > - i++; > - } > + if (!size) > + goto out; > > - sf_cap = size; > - for (j = 0; sf_cap*10 < 1000; j++) > - sf_cap *= 10; > + while (b...

...u32 remainder = 0, sf_cap, exp; > char tmp[8]; > + const char *unit; > > tmp[0] = '\0'; > i = 0; > - if (size >= divisor[units]) { > - while (size >= divisor[units]) { > - remainder = do_div(size, divisor[units]); > - i++; > - } > + if (!size) > + goto out; > > - sf_cap = size; > - for (j = 0; sf_cap*10 < 1000; j++) > - sf_cap *= 10; > + while (b...

In a multi device setup, the chunk allocator currently always allocates chunks on the devices in the same order. This leads to a very uneven distribution, especially with RAID1 or RAID10 and an uneven number of devices. This patch always sorts the devices before allocating, and allocates the stripes on the devices with the most available space, as long as there is enough space available. In a low

Hey, Over the last weeks, there has been some discussion regarding paravirt lpj calculation for kvm. Here's my shot at that. KVM hypervisor already put the right value in our pvclock structures, as part of the xen compatibility efforts. So the first patch moves the respective xen code to pvclock.c (since we'll be doing the same calculation anyway), while the second, implements functions

Hey, Over the last weeks, there has been some discussion regarding paravirt lpj calculation for kvm. Here's my shot at that. KVM hypervisor already put the right value in our pvclock structures, as part of the xen compatibility efforts. So the first patch moves the respective xen code to pvclock.c (since we'll be doing the same calculation anyway), while the second, implements functions

...:04:43 2007 -0800 +++ b/arch/i386/kernel/vmitime.c Tue Feb 27 14:06:46 2007 -0800 @@ -177,6 +177,15 @@ unsigned long long vmi_get_sched_cycles( return read_available_cycles(); } +unsigned long vmi_cpu_khz(void) +{ + unsigned long long khz; + + khz = vmi_timer_ops.get_cycle_frequency(); + (void)do_div(khz, 1000); + return khz; +} + void __init vmi_time_init(void) { unsigned long long cycles_per_sec, cycles_per_msec; @@ -206,7 +215,6 @@ void __init vmi_time_init(void) (void)do_div(cycles_per_alarm, alarm_hz); cycles_per_msec = cycles_per_sec; (void)do_div(cycles_per_msec, 1000); - cpu_k...

...:04:43 2007 -0800 +++ b/arch/i386/kernel/vmitime.c Tue Feb 27 14:06:46 2007 -0800 @@ -177,6 +177,15 @@ unsigned long long vmi_get_sched_cycles( return read_available_cycles(); } +unsigned long vmi_cpu_khz(void) +{ + unsigned long long khz; + + khz = vmi_timer_ops.get_cycle_frequency(); + (void)do_div(khz, 1000); + return khz; +} + void __init vmi_time_init(void) { unsigned long long cycles_per_sec, cycles_per_msec; @@ -206,7 +215,6 @@ void __init vmi_time_init(void) (void)do_div(cycles_per_alarm, alarm_hz); cycles_per_msec = cycles_per_sec; (void)do_div(cycles_per_msec, 1000); - cpu_k...

...> > > > +# define roundup_64(x, y) ( \ > > +{ \ > > + typeof(y) __y = y; \ > > + typeof(x) __x = (x) + (__y - 1); \ > > + do_div(__x, __y); \ > > + __x * __y; \ > > +} \ > > The thing about this is that it absolutely sucks for power-of-two arguments. > > The regular roundup()...

...edt at goodmis.org> wrote: > > +# define roundup_64(x, y) ( \ > +{ \ > + typeof(y) __y = y; \ > + typeof(x) __x = (x) + (__y - 1); \ > + do_div(__x, __y); \ > + __x * __y; \ > +} \ The thing about this is that it absolutely sucks for power-of-two arguments. The regular roundup() that uses division has the co...

--- drivers/gpu/drm/i2c/ch7006_drv.c | 2 +- drivers/gpu/drm/i2c/ch7006_mode.c | 2 +- drivers/gpu/drm/i2c/ch7006_priv.h | 5 ++--- 3 files changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i2c/ch7006_drv.c b/drivers/gpu/drm/i2c/ch7006_drv.c index c2594a1..7df4b86 100644 --- a/drivers/gpu/drm/i2c/ch7006_drv.c +++ b/drivers/gpu/drm/i2c/ch7006_drv.c @@ -351,7 +351,7

...t(u64, em->len - offset, @@ -2818,8 +2799,7 @@ again: current->pid % map->sub_stripes); } - } else if (map->type & (BTRFS_BLOCK_GROUP_RAID5 | - BTRFS_BLOCK_GROUP_RAID6)) { + } else if (map->type & BTRFS_BLOCK_GROUP_RAID56) { u64 tmp; stripe_index = do_div(stripe_nr, nr_data_stripes(map)); @@ -2841,7 +2821,7 @@ again: em->start + (tmp + i) * map->stripe_len; raid_map[(i+rot) % map->num_stripes] = RAID5_P_STRIPE; - if (map->type & BTRFS_BLOCK_GROUP_RAID6) + if ((map->type >> 56) >= 2) raid_map[(i+rot+1)...

Signed-off-by: Francisco Jerez <currojerez at riseup.net> --- drivers/gpu/drm/i2c/ch7006_drv.c | 2 +- drivers/gpu/drm/i2c/ch7006_mode.c | 2 +- drivers/gpu/drm/i2c/ch7006_priv.h | 5 ++--- 3 files changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i2c/ch7006_drv.c b/drivers/gpu/drm/i2c/ch7006_drv.c index c2594a1..7df4b86 100644 ---