Sorry, no question, pointer alignment of course.
Denis Efremov писал 2019-09-13 14:48:
Hi,
Sorry for reviving this conversation, but it looks to me like
this function could be reduced to a single bitmap_weight call:
static inline size_t memweight(const void *ptr, size_t bytes)
{
Hi,
Sorry for reviving this conversation, but it looks to me like
this function could be reduced to a single bitmap_weight call:
static inline size_t memweight(const void *ptr, size_t bytes)
{
BUG_ON(bytes >= UINT_MAX / BITS_PER_BYTE);
return bitmap_weight(ptr, bytes *
On Sun, Aug 25, 2019 at 02:39:47PM +0300, Denis Efremov wrote:
> On 25.08.2019 09:11, Matthew Wilcox wrote:
> > On Sat, Aug 24, 2019 at 01:01:02PM +0300, Denis Efremov wrote:
> >> This patch open codes the bitmap_weight() call. The direct
> >> invocation of hweight_long() allows to remove the
On 25.08.2019 09:11, Matthew Wilcox wrote:
> On Sat, Aug 24, 2019 at 01:01:02PM +0300, Denis Efremov wrote:
>> This patch open codes the bitmap_weight() call. The direct
>> invocation of hweight_long() allows to remove the BUG_ON and
>> excessive "longs to bits, bits to longs" conversion.
>
>
On Sat, Aug 24, 2019 at 01:01:02PM +0300, Denis Efremov wrote:
> This patch open codes the bitmap_weight() call. The direct
> invocation of hweight_long() allows to remove the BUG_ON and
> excessive "longs to bits, bits to longs" conversion.
Honestly, that's not the problem with this function.
This patch open codes the bitmap_weight() call. The direct
invocation of hweight_long() allows to remove the BUG_ON and
excessive "longs to bits, bits to longs" conversion.
BUG_ON was required to check that bitmap_weight() will return
a correct value, i.e. the computed weight will fit the int
