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From: Yury Norov <yury.norov@gmail.com>
To: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Yury Norov <yury.norov@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org,
	linux-mmc@vger.kernel.org, linux-perf-users@vger.kernel.org,
	kvm@vger.kernel.org,
	"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
	Alexander Lobakin <alobakin@pm.me>,
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	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
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	Steven Rostedt <rostedt@goodmis.org>, Tejun Heo <tj@kernel.org>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Will Deacon <will@kernel.org>,
	Wolfram Sang <wsa+renesas@sang-engineering.com>,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	kernel test robot <lkp@intel.com>
Subject: [PATCH 01/16] bitops: protect find_first_{,zero}_bit properly
Date: Mon,  4 Oct 2021 22:40:44 -0700	[thread overview]
Message-ID: <20211005054059.475634-2-yury.norov@gmail.com> (raw)
In-Reply-To: <20211005054059.475634-1-yury.norov@gmail.com>

find_first_bit() and find_first_zero_bit() are not protected with
ifdefs as other functions in find.h. It causes build errors on some
platforms if CONFIG_GENERIC_FIND_FIRST_BIT is enabled.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
Fixes: 2cc7b6a44ac2 ("lib: add fast path for find_first_*_bit() and find_last_bit()")
Reported-by: kernel test robot <lkp@intel.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 include/asm-generic/bitops/find.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/asm-generic/bitops/find.h b/include/asm-generic/bitops/find.h
index 0d132ee2a291..835f959a25f2 100644
--- a/include/asm-generic/bitops/find.h
+++ b/include/asm-generic/bitops/find.h
@@ -97,6 +97,7 @@ unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size,
 
 #ifdef CONFIG_GENERIC_FIND_FIRST_BIT
 
+#ifndef find_first_bit
 /**
  * find_first_bit - find the first set bit in a memory region
  * @addr: The address to start the search at
@@ -116,7 +117,9 @@ unsigned long find_first_bit(const unsigned long *addr, unsigned long size)
 
 	return _find_first_bit(addr, size);
 }
+#endif
 
+#ifndef find_first_zero_bit
 /**
  * find_first_zero_bit - find the first cleared bit in a memory region
  * @addr: The address to start the search at
@@ -136,6 +139,8 @@ unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size)
 
 	return _find_first_zero_bit(addr, size);
 }
+#endif
+
 #else /* CONFIG_GENERIC_FIND_FIRST_BIT */
 
 #ifndef find_first_bit
-- 
2.30.2


  reply	other threads:[~2021-10-05  5:41 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-05  5:40 [PATCH RESEND 3 00/16] Bitmap patches for 5.15 Yury Norov
2021-10-05  5:40 ` Yury Norov [this message]
2021-10-05  5:40 ` [PATCH 02/16] bitops: move find_bit_*_le functions from le.h to find.h Yury Norov
2021-10-05  5:40 ` [PATCH 03/16] include: move find.h from asm_generic to linux Yury Norov
2021-10-05  5:40 ` [PATCH 04/16] arch: remove GENERIC_FIND_FIRST_BIT entirely Yury Norov
2021-10-05  5:40 ` [PATCH 05/16] lib: add find_first_and_bit() Yury Norov
2021-10-05  5:40 ` [PATCH 06/16] cpumask: use find_first_and_bit() Yury Norov
2021-10-05  5:40 ` [PATCH 07/16] all: replace find_next{,_zero}_bit with find_first{,_zero}_bit where appropriate Yury Norov
2021-10-05  5:40 ` [PATCH 08/16] tools: sync tools/bitmap with mother linux Yury Norov
2021-10-05  5:40 ` [PATCH 09/16] cpumask: replace cpumask_next_* with cpumask_first_* where appropriate Yury Norov
2021-10-05  5:40 ` [PATCH 10/16] include/linux: move for_each_bit() macros from bitops.h to find.h Yury Norov
2021-10-05  5:40 ` [PATCH 11/16] find: micro-optimize for_each_{set,clear}_bit() Yury Norov
2021-10-05  5:40 ` [PATCH 12/16] Replace for_each_*_bit_from() with for_each_*_bit() where appropriate Yury Norov
2021-10-05  5:40 ` [PATCH 13/16] mm/percpu: micro-optimize pcpu_is_populated() Yury Norov
2021-10-05  5:40 ` [PATCH 14/16] bitmap: unify find_bit operations Yury Norov
2021-10-05  5:40 ` [PATCH 15/16] lib: bitmap: add performance test for bitmap_print_to_pagebuf Yury Norov
2021-10-05  5:40 ` [PATCH 16/16] vsprintf: rework bitmap_list_string Yury Norov
2021-10-05  6:02 ` [PATCH RESEND 3 00/16] Bitmap patches for 5.15 Stephen Rothwell
  -- strict thread matches above, loose matches on Subject: below --
2021-10-01 18:12 [PATCH RESEND 2 00/16] Resend bitmap patches Yury Norov
2021-10-01 18:12 ` [PATCH 01/16] bitops: protect find_first_{,zero}_bit properly Yury Norov
2021-10-01 18:12 [PATCH RESEND 2 00/16] Resend bitmap patches Yury Norov
2021-10-01 18:12 ` [PATCH 01/16] bitops: protect find_first_{,zero}_bit properly Yury Norov

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