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s390/cpum_sf: Use DIV_ROUND_UP 

Use macro DIV_ROUND_UP() for calculation of number of SDBT
SDBT pages required for index pages. This macro is already
used throughout the file.

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Thomas Richter 2020-01-03 11:37:12 +01:00 committed by Vasily Gorbik
parent 32dab6828c
commit ee09c91480
1 changed files with 1 additions and 1 deletions
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2
arch/s390/kernel/perf_cpum_sf.c
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@ -1716,7 +1716,7 @@ static void *aux_buffer_setup(struct perf_event *event, void **pages,
sfb = &aux->sfb;
/* Allocate sdbt_index for fast reference */
n_sdbt = (nr_pages + CPUM_SF_SDB_PER_TABLE - 1) / CPUM_SF_SDB_PER_TABLE;
n_sdbt = DIV_ROUND_UP(nr_pages, CPUM_SF_SDB_PER_TABLE);
aux->sdbt_index = kmalloc_array(n_sdbt, sizeof(void *), GFP_KERNEL);
if (!aux->sdbt_index)
goto no_sdbt_index;