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authorMikulas Patocka <mpatocka@redhat.com>2022-08-26 23:43:51 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-08-27 19:49:54 +0300
commitd6ffe6067a54972564552ea45d320fb98db1ac5e (patch)
treef5e9fe0bc2a8eaa1669802af515b91498ea806af /arch
parente022620b5d056e822e42eb9bc0f24fcb97389d86 (diff)
downloadlinux-d6ffe6067a54972564552ea45d320fb98db1ac5e.tar.xz
provide arch_test_bit_acquire for architectures that define test_bit
Some architectures define their own arch_test_bit and they also need arch_test_bit_acquire, otherwise they won't compile. We also clean up the code by using the generic test_bit if that is equivalent to the arch-specific version. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org Fixes: 8238b4579866 ("wait_on_bit: add an acquire memory barrier") Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/alpha/include/asm/bitops.h7
-rw-r--r--arch/hexagon/include/asm/bitops.h15
-rw-r--r--arch/ia64/include/asm/bitops.h7
-rw-r--r--arch/m68k/include/asm/bitops.h7
-rw-r--r--arch/s390/include/asm/bitops.h10
-rw-r--r--arch/sh/include/asm/bitops-op32.h12
6 files changed, 25 insertions, 33 deletions
diff --git a/arch/alpha/include/asm/bitops.h b/arch/alpha/include/asm/bitops.h
index 492c7713ddae..bafb1c1f0fdc 100644
--- a/arch/alpha/include/asm/bitops.h
+++ b/arch/alpha/include/asm/bitops.h
@@ -283,11 +283,8 @@ arch___test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
return (old & mask) != 0;
}
-static __always_inline bool
-arch_test_bit(unsigned long nr, const volatile unsigned long *addr)
-{
- return (1UL & (((const int *) addr)[nr >> 5] >> (nr & 31))) != 0UL;
-}
+#define arch_test_bit generic_test_bit
+#define arch_test_bit_acquire generic_test_bit_acquire
/*
* ffz = Find First Zero in word. Undefined if no zero exists,
diff --git a/arch/hexagon/include/asm/bitops.h b/arch/hexagon/include/asm/bitops.h
index da500471ac73..160d8f37fa1a 100644
--- a/arch/hexagon/include/asm/bitops.h
+++ b/arch/hexagon/include/asm/bitops.h
@@ -179,6 +179,21 @@ arch_test_bit(unsigned long nr, const volatile unsigned long *addr)
return retval;
}
+static __always_inline bool
+arch_test_bit_acquire(unsigned long nr, const volatile unsigned long *addr)
+{
+ int retval;
+
+ asm volatile(
+ "{P0 = tstbit(%1,%2); if (P0.new) %0 = #1; if (!P0.new) %0 = #0;}\n"
+ : "=&r" (retval)
+ : "r" (addr[BIT_WORD(nr)]), "r" (nr % BITS_PER_LONG)
+ : "p0", "memory"
+ );
+
+ return retval;
+}
+
/*
* ffz - find first zero in word.
* @word: The word to search
diff --git a/arch/ia64/include/asm/bitops.h b/arch/ia64/include/asm/bitops.h
index 9f62af7fd7c4..1accb7842f58 100644
--- a/arch/ia64/include/asm/bitops.h
+++ b/arch/ia64/include/asm/bitops.h
@@ -331,11 +331,8 @@ arch___test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
return (old & bit) != 0;
}
-static __always_inline bool
-arch_test_bit(unsigned long nr, const volatile unsigned long *addr)
-{
- return 1 & (((const volatile __u32 *) addr)[nr >> 5] >> (nr & 31));
-}
+#define arch_test_bit generic_test_bit
+#define arch_test_bit_acquire generic_test_bit_acquire
/**
* ffz - find the first zero bit in a long word
diff --git a/arch/m68k/include/asm/bitops.h b/arch/m68k/include/asm/bitops.h
index 470aed978590..e984af71df6b 100644
--- a/arch/m68k/include/asm/bitops.h
+++ b/arch/m68k/include/asm/bitops.h
@@ -157,11 +157,8 @@ arch___change_bit(unsigned long nr, volatile unsigned long *addr)
change_bit(nr, addr);
}
-static __always_inline bool
-arch_test_bit(unsigned long nr, const volatile unsigned long *addr)
-{
- return (addr[nr >> 5] & (1UL << (nr & 31))) != 0;
-}
+#define arch_test_bit generic_test_bit
+#define arch_test_bit_acquire generic_test_bit_acquire
static inline int bset_reg_test_and_set_bit(int nr,
volatile unsigned long *vaddr)
diff --git a/arch/s390/include/asm/bitops.h b/arch/s390/include/asm/bitops.h
index 9a7d15da966e..2de74fcd0578 100644
--- a/arch/s390/include/asm/bitops.h
+++ b/arch/s390/include/asm/bitops.h
@@ -176,14 +176,8 @@ arch___test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
return old & mask;
}
-static __always_inline bool
-arch_test_bit(unsigned long nr, const volatile unsigned long *addr)
-{
- const volatile unsigned long *p = __bitops_word(nr, addr);
- unsigned long mask = __bitops_mask(nr);
-
- return *p & mask;
-}
+#define arch_test_bit generic_test_bit
+#define arch_test_bit_acquire generic_test_bit_acquire
static inline bool arch_test_and_set_bit_lock(unsigned long nr,
volatile unsigned long *ptr)
diff --git a/arch/sh/include/asm/bitops-op32.h b/arch/sh/include/asm/bitops-op32.h
index 565a85d8b7fb..5ace89b46507 100644
--- a/arch/sh/include/asm/bitops-op32.h
+++ b/arch/sh/include/asm/bitops-op32.h
@@ -135,16 +135,8 @@ arch___test_and_change_bit(unsigned long nr, volatile unsigned long *addr)
return (old & mask) != 0;
}
-/**
- * arch_test_bit - Determine whether a bit is set
- * @nr: bit number to test
- * @addr: Address to start counting from
- */
-static __always_inline bool
-arch_test_bit(unsigned long nr, const volatile unsigned long *addr)
-{
- return 1UL & (addr[BIT_WORD(nr)] >> (nr & (BITS_PER_LONG-1)));
-}
+#define arch_test_bit generic_test_bit
+#define arch_test_bit_acquire generic_test_bit_acquire
#include <asm-generic/bitops/non-instrumented-non-atomic.h>