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disk: part: rename parameter of lba512_muldiv()

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div_by is a misleading parameter name, when we are doing >> div_by.
Rename it to right_shift.

Reported-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2020-01-16 20:36:58 +01:00 committed by Tom Rini
parent c7c0233235
commit a9d1c0e2bc
1 changed files with 7 additions and 6 deletions
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13
disk/part.c
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@ -104,17 +104,18 @@ typedef lbaint_t lba512_t;
#endif
/*
* Overflowless variant of (block_count * mul_by / 2**div_by)
* when div_by > mul_by
* Overflowless variant of (block_count * mul_by / 2**right_shift)
* when 2**right_shift > mul_by
*/
static lba512_t lba512_muldiv(lba512_t block_count, lba512_t mul_by, int div_by)
static lba512_t lba512_muldiv(lba512_t block_count, lba512_t mul_by,
int right_shift)
{
lba512_t bc_quot, bc_rem;
/* x * m / d == x / d * m + (x % d) * m / d */
bc_quot = block_count >> div_by;
bc_rem = block_count - (bc_quot << div_by);
return bc_quot * mul_by + ((bc_rem * mul_by) >> div_by);
bc_quot = block_count >> right_shift;
bc_rem = block_count - (bc_quot << right_shift);
return bc_quot * mul_by + ((bc_rem * mul_by) >> right_shift);
}
void dev_print (struct blk_desc *dev_desc)