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mm/hmm: move pmd_to_hmm_pfn_flags() to the respective #ifdeffery

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commit 188cb385bb upstream.

When pmd_to_hmm_pfn_flags() is unused, it prevents kernel builds with
clang, `make W=1` and CONFIG_TRANSPARENT_HUGEPAGE=n:

  mm/hmm.c:186:29: warning: unused function 'pmd_to_hmm_pfn_flags' [-Wunused-function]

Fix this by moving the function to the respective existing ifdeffery
for its the only user.

See also:

  6863f5643d ("kbuild: allow Clang to find unused static inline functions for W=1 build")

Link: https://lkml.kernel.org/r/20250710082403.664093-1-andriy.shevchenko@linux.intel.com
Fixes: 992de9a8b7 ("mm/hmm: allow to mirror vma of a file on a DAX backed filesystem")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Cc: Andriy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Bill Wendling <morbo@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2025-07-10 11:23:53 +03:00 committed by Greg Kroah-Hartman
parent 42ade82926
commit 66b1f50158
1 changed files with 1 additions and 1 deletions
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2
mm/hmm.c
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@ -173,6 +173,7 @@ static inline unsigned long hmm_pfn_flags_order(unsigned long order)
return order << HMM_PFN_ORDER_SHIFT; return order << HMM_PFN_ORDER_SHIFT;
} }
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static inline unsigned long pmd_to_hmm_pfn_flags(struct hmm_range *range, static inline unsigned long pmd_to_hmm_pfn_flags(struct hmm_range *range,
pmd_t pmd) pmd_t pmd)
{ {
@ -183,7 +184,6 @@ static inline unsigned long pmd_to_hmm_pfn_flags(struct hmm_range *range,
hmm_pfn_flags_order(PMD_SHIFT - PAGE_SHIFT); hmm_pfn_flags_order(PMD_SHIFT - PAGE_SHIFT);
} }
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static int hmm_vma_handle_pmd(struct mm_walk *walk, unsigned long addr, static int hmm_vma_handle_pmd(struct mm_walk *walk, unsigned long addr,
unsigned long end, unsigned long hmm_pfns[], unsigned long end, unsigned long hmm_pfns[],
pmd_t pmd) pmd_t pmd)