linux-kernel - linux-next: manual merge of the tip tree with the asm-generic tree

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Date:   Mon, 16 Aug 2021 11:47:40 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Arnd Bergmann <arnd@...db.de>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>,
        Vineet Gupta <Vineet.Gupta1@...opsys.com>,
        Vineet Gupta <vgupta@...opsys.com>
Subject: linux-next: manual merge of the tip tree with the asm-generic tree

Hi all,

Today's linux-next merge of the tip tree got a conflict in:

  include/asm-generic/bitops/non-atomic.h

between commit:

  8f76f9c46952 ("bitops/non-atomic: make @nr unsigned to avoid any DIV")

from the asm-generic tree and commit:

  cf3ee3c8c29d ("locking/atomic: add generic arch_*() bitops")

from the tip tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc include/asm-generic/bitops/non-atomic.h
index c5a7d8eb9c2b,365377fb104b..000000000000
--- a/include/asm-generic/bitops/non-atomic.h
+++ b/include/asm-generic/bitops/non-atomic.h
@@@ -13,15 -13,18 +13,18 @@@
   * If it's called on the same region of memory simultaneously, the effect
   * may be that only one operation succeeds.
   */
- static inline void __set_bit(unsigned int nr, volatile unsigned long *addr)
+ static __always_inline void
 -arch___set_bit(int nr, volatile unsigned long *addr)
++arch___set_bit(unsigned int nr, volatile unsigned long *addr)
  {
  	unsigned long mask = BIT_MASK(nr);
  	unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
  
  	*p  |= mask;
  }
+ #define __set_bit arch___set_bit
  
- static inline void __clear_bit(unsigned int nr, volatile unsigned long *addr)
+ static __always_inline void
 -arch___clear_bit(int nr, volatile unsigned long *addr)
++arch___clear_bit(unsigned int nr, volatile unsigned long *addr)
  {
  	unsigned long mask = BIT_MASK(nr);
  	unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
@@@ -38,7 -42,8 +42,8 @@@
   * If it's called on the same region of memory simultaneously, the effect
   * may be that only one operation succeeds.
   */
- static inline void __change_bit(unsigned int nr, volatile unsigned long *addr)
+ static __always_inline
 -void arch___change_bit(int nr, volatile unsigned long *addr)
++void arch___change_bit(unsigned int nr, volatile unsigned long *addr)
  {
  	unsigned long mask = BIT_MASK(nr);
  	unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
@@@ -55,7 -61,8 +61,8 @@@
   * If two examples of this operation race, one can appear to succeed
   * but actually fail.  You must protect multiple accesses with a lock.
   */
- static inline int __test_and_set_bit(unsigned int nr, volatile unsigned long *addr)
+ static __always_inline int
 -arch___test_and_set_bit(int nr, volatile unsigned long *addr)
++arch___test_and_set_bit(unsigned int nr, volatile unsigned long *addr)
  {
  	unsigned long mask = BIT_MASK(nr);
  	unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
@@@ -74,7 -82,8 +82,8 @@@
   * If two examples of this operation race, one can appear to succeed
   * but actually fail.  You must protect multiple accesses with a lock.
   */
- static inline int __test_and_clear_bit(unsigned int nr, volatile unsigned long *addr)
+ static __always_inline int
 -arch___test_and_clear_bit(int nr, volatile unsigned long *addr)
++arch___test_and_clear_bit(unsigned int nr, volatile unsigned long *addr)
  {
  	unsigned long mask = BIT_MASK(nr);
  	unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
@@@ -83,10 -92,11 +92,11 @@@
  	*p = old & ~mask;
  	return (old & mask) != 0;
  }
+ #define __test_and_clear_bit arch___test_and_clear_bit
  
  /* WARNING: non atomic and it can be reordered! */
- static inline int __test_and_change_bit(unsigned int nr,
- 					    volatile unsigned long *addr)
+ static __always_inline int
 -arch___test_and_change_bit(int nr, volatile unsigned long *addr)
++arch___test_and_change_bit(unsigned int nr, volatile unsigned long *addr)
  {
  	unsigned long mask = BIT_MASK(nr);
  	unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
@@@ -101,7 -112,8 +112,8 @@@
   * @nr: bit number to test
   * @addr: Address to start counting from
   */
- static inline int test_bit(unsigned int nr, const volatile unsigned long *addr)
+ static __always_inline int
 -arch_test_bit(int nr, const volatile unsigned long *addr)
++arch_test_bit(unsigned int nr, const volatile unsigned long *addr)
  {
  	return 1UL & (addr[BIT_WORD(nr)] >> (nr & (BITS_PER_LONG-1)));
  }

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