[xen staging] xen/bitops: Implement hweight32() in terms of hweightl()

[patchbot@xxxxxxx]

commit f20504e1cf78c90a50335f080f6393af02b8372f
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Thu Aug 22 21:40:11 2024 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Mon Sep 9 14:59:05 2024 +0100

    xen/bitops: Implement hweight32() in terms of hweightl()
    
    ... and drop generic_hweight32().
    
    As noted previously, the only two users of hweight32() are in __init paths.
    
    The int-optimised form of generic_hweight() is only two instructions shorter
    than the long-optimised form, and even then only on architectures which lack
    fast multiplication, so there's no point providing an int-optimised form.
    
    No functional change.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/arch/arm/include/asm/bitops.h | 1 -
 xen/arch/ppc/include/asm/bitops.h | 1 -
 xen/arch/x86/include/asm/bitops.h | 1 -
 xen/include/xen/bitops.h          | 5 +++++
 4 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/xen/arch/arm/include/asm/bitops.h 
b/xen/arch/arm/include/asm/bitops.h
index 91cd167b6b..b28c25b3d5 100644
--- a/xen/arch/arm/include/asm/bitops.h
+++ b/xen/arch/arm/include/asm/bitops.h
@@ -85,7 +85,6 @@ bool clear_mask16_timeout(uint16_t mask, volatile void *p,
  * The Hamming Weight of a number is the total number of bits set in it.
  */
 #define hweight64(x) generic_hweight64(x)
-#define hweight32(x) generic_hweight32(x)
 
 #endif /* _ARM_BITOPS_H */
 /*
diff --git a/xen/arch/ppc/include/asm/bitops.h 
b/xen/arch/ppc/include/asm/bitops.h
index 64512e9495..f488a7c034 100644
--- a/xen/arch/ppc/include/asm/bitops.h
+++ b/xen/arch/ppc/include/asm/bitops.h
@@ -133,6 +133,5 @@ static inline int test_and_set_bit(unsigned int nr, 
volatile void *addr)
  * The Hamming Weight of a number is the total number of bits set in it.
  */
 #define hweight64(x) __builtin_popcountll(x)
-#define hweight32(x) __builtin_popcount(x)
 
 #endif /* _ASM_PPC_BITOPS_H */
diff --git a/xen/arch/x86/include/asm/bitops.h 
b/xen/arch/x86/include/asm/bitops.h
index 4c5b21907a..507b043b8a 100644
--- a/xen/arch/x86/include/asm/bitops.h
+++ b/xen/arch/x86/include/asm/bitops.h
@@ -482,6 +482,5 @@ static always_inline unsigned int arch_flsl(unsigned long x)
  * The Hamming Weight of a number is the total number of bits set in it.
  */
 #define hweight64(x) generic_hweight64(x)
-#define hweight32(x) generic_hweight32(x)
 
 #endif /* _X86_BITOPS_H */
diff --git a/xen/include/xen/bitops.h b/xen/include/xen/bitops.h
index 58c600155f..a462c30651 100644
--- a/xen/include/xen/bitops.h
+++ b/xen/include/xen/bitops.h
@@ -326,6 +326,11 @@ static always_inline attr_const unsigned int 
hweightl(unsigned long x)
 #endif
 }
 
+static always_inline attr_const unsigned int hweight32(uint32_t x)
+{
+    return hweightl(x);
+}
+
 /* --------------------- Please tidy below here --------------------- */
 
 #ifndef find_next_bit
--
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