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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Zi Yan , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , Kiryl Shutsemau , Peter Xu , linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Andrew Morton , David Hildenbrand , Shuah Khan , Jason Gunthorpe , Leon Romanovsky , Sarthak Sharma , Yeoreum Yun X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1704; i=yeoreum.yun@arm.com; h=from:subject:message-id; bh=BeGlU6VoC2nhiSQChEYkjBQ7HxlULOrBNPE3lWJ9ZRw=; b=owEB7QES/pANAwAKAW3Vw9FaxTEzAcsmYgBqp6KzBl9ctDoG65maPc1EIPIDgHe0gQnqDEXw/ s+xku9RaRaJAbMEAAEKAB0WIQQtg+CS3QUzuFh1pJ1t1cPRWsUxMwUCaqeiswAKCRBt1cPRWsUx M9/0C/9PWswjSpx0cGos+ZePQPwtwlTukxcDz008DaWMjW9Pkd3nB3L9u8cQBWHisni2DEI+aMN kusuTkSLArK90ltCu5NtTJFZdhtn36RMPnUL4M2Q1OFsGo+ko+flul75cKIGY6pdvJt+soRQpTG GgTDMU1jmqpJElRdvszmhchzZb4+KdcqdRkkTRX6cmsxzbza6tiKK/7v88Uh6XihVlWgiqYLvJb xTGxWNJ09cRBAFKP6OeTMLSvQXXe0MtfBw34NRIQnQJyaDsWBiIzeFTewlGvqXlQOP9T56atWqR /lEKfvTY9G3w2ekHpscWvy7ULp9UesNcGm7LpHAIDASOR3tDhTt7mRxJ/YLBWODIbTjWTiW0SJO AjKB7jeq2PVA7id415eseiDmefXz78nXY+2d46buB4Fcd4Q3pClXBHLf/wXX5zi4wkde9NwuObH WFjQVU+atoMMulCs/5FNLVeuWbpvKyq3j6yGrv3Hen91EihT4zvce3x442qRLJWiIvPKo= X-Developer-Key: i=yeoreum.yun@arm.com; a=openpgp; fpr=2D83E092DD0533B85875A49D6DD5C3D15AC53133 X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 36E8640006 X-Stat-Signature: 8uj75wnyyzxfcf47dn97zww6zn6tzsb9 X-HE-Tag: 1789371076-3942 X-HE-Meta: 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 Ww6CxvPz x6Ks912SbgXgLpUqkp94PXfhE6opZa2IvOLTr/GIwLpNQPRPiSZUi8UyOwLOwVF7gRFQDEKN4Jrz6Qmb6figH05mGcv3zr6r6F/I5eiuPn8d92oI8GsulhKCE1ULAtY1XpfK22Ldm9EPCOMwVPzcGZZtitWtfsnnXpYOgbryIXWkpMMjwriuZyTnJHipZgKnscG0HRosFIikoEDkHmatbdyzbvEyMAe143cirxGQIOYcjCgMEgy+yJexrILR5Lvxndl0CPBifeh9UM0SgolzBb4ijNU5rsCw3Sc1eKRUw/r2H73kyh9rQJj9ceY3Ayn0C2odnKOvECHqp1qc= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Introduce size_to_shift() for future users that need to obtain shift of a huge-page which is other than pmd_psize(). Suggested-by: David Hildenbrand (Arm) Signed-off-by: Yeoreum Yun --- tools/testing/selftests/mm/vm_util.c | 10 +++++++++- tools/testing/selftests/mm/vm_util.h | 1 + 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/vm_util.c b/tools/testing/selftests/mm/vm_util.c index fd1432dc6152..1fef1266429f 100644 --- a/tools/testing/selftests/mm/vm_util.c +++ b/tools/testing/selftests/mm/vm_util.c @@ -157,6 +157,14 @@ bool check_for_pattern(FILE *fp, const char *pattern, char *buf, size_t len) return false; } +uint64_t size_to_shift(uint64_t size) +{ + if (__builtin_popcountll(size) != 1) + return 0; + + return ffsl(size) - 1; +} + uint64_t pmd_psize(void) { int fd; @@ -194,7 +202,7 @@ uint64_t pmd_pshift(void) if (!__pmd_psize) return 0; - __pmd_pshift = ffsl(__pmd_psize) - 1; + __pmd_pshift = size_to_shift(__pmd_psize); return __pmd_pshift; } diff --git a/tools/testing/selftests/mm/vm_util.h b/tools/testing/selftests/mm/vm_util.h index 71af4804f8f2..0048e0e82770 100644 --- a/tools/testing/selftests/mm/vm_util.h +++ b/tools/testing/selftests/mm/vm_util.h @@ -90,6 +90,7 @@ bool pagemap_is_populated(int fd, char *start); unsigned long pagemap_get_pfn(int fd, char *start); void clear_softdirty(void); bool check_for_pattern(FILE *fp, const char *pattern, char *buf, size_t len); +uint64_t size_to_shift(uint64_t size); uint64_t pmd_psize(void); uint64_t pmd_pshift(void); unsigned long rss_anon(void); -- 2.43.0