x86/mm: Fix kernel-doc descriptions of various pgtable methods

So 'make W=1' complains about a couple of kernel-doc descriptions
in our MM primitives in pgtable.c:

  arch/x86/mm/pgtable.c:623: warning: Function parameter or struct member 'reserve' not described in 'reserve_top_address'
  arch/x86/mm/pgtable.c:672: warning: Function parameter or struct member 'p4d' not described in 'p4d_set_huge'
  arch/x86/mm/pgtable.c:672: warning: Function parameter or struct member 'addr' not described in 'p4d_set_huge'
  ... so on

Fix them all up, add missing parameter documentation, and fix various spelling
inconsistencies while at it.

[ mingo: Harmonize kernel-doc annotations some more. ]

Signed-off-by: Shivank Garg <shivankg@amd.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Link: https://lore.kernel.org/r/20250514062637.3287779-1-shivankg@amd.com

Author: shivankgarg98

arch/x86/mm/pgtable.c

@@ -543,11 +543,11 @@ pud_t pudp_invalidate(struct vm_area_struct *vma, unsigned long address,
 #endif
 
 /**
- * reserve_top_address - reserves a hole in the top of kernel address space
- * @reserve - size of hole to reserve
+ * reserve_top_address - Reserve a hole in the top of the kernel address space
+ * @reserve: Size of hole to reserve
  *
  * Can be used to relocate the fixmap area and poke a hole in the top
- * of kernel address space to make room for a hypervisor.
+ * of the kernel address space to make room for a hypervisor.
  */
 void __init reserve_top_address(unsigned long reserve)
 {
@@ -594,7 +594,10 @@ void native_set_fixmap(unsigned /* enum fixed_addresses */ idx,
 #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
 #ifdef CONFIG_X86_5LEVEL
 /**
- * p4d_set_huge - setup kernel P4D mapping
+ * p4d_set_huge - Set up kernel P4D mapping
+ * @p4d: Pointer to the P4D entry
+ * @addr: Virtual address associated with the P4D entry
+ * @prot: Protection bits to use
  *
  * No 512GB pages yet -- always return 0
  */
@@ -604,17 +607,21 @@ int p4d_set_huge(p4d_t *p4d, phys_addr_t addr, pgprot_t prot)
 }
 
 /**
- * p4d_clear_huge - clear kernel P4D mapping when it is set
+ * p4d_clear_huge - Clear kernel P4D mapping when it is set
+ * @p4d: Pointer to the P4D entry to clear
  *
- * No 512GB pages yet -- always return 0
+ * No 512GB pages yet -- do nothing
  */
 void p4d_clear_huge(p4d_t *p4d)
 {
 }
 #endif
 
 /**
- * pud_set_huge - setup kernel PUD mapping
+ * pud_set_huge - Set up kernel PUD mapping
+ * @pud: Pointer to the PUD entry
+ * @addr: Virtual address associated with the PUD entry
+ * @prot: Protection bits to use
  *
  * MTRRs can override PAT memory types with 4KiB granularity. Therefore, this
  * function sets up a huge page only if the complete range has the same MTRR
@@ -645,7 +652,10 @@ int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot)
 }
 
 /**
- * pmd_set_huge - setup kernel PMD mapping
+ * pmd_set_huge - Set up kernel PMD mapping
+ * @pmd: Pointer to the PMD entry
+ * @addr: Virtual address associated with the PMD entry
+ * @prot: Protection bits to use
  *
  * See text over pud_set_huge() above.
  *
@@ -674,7 +684,8 @@ int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot)
 }
 
 /**
- * pud_clear_huge - clear kernel PUD mapping when it is set
+ * pud_clear_huge - Clear kernel PUD mapping when it is set
+ * @pud: Pointer to the PUD entry to clear.
  *
  * Returns 1 on success and 0 on failure (no PUD map is found).
  */
@@ -689,7 +700,8 @@ int pud_clear_huge(pud_t *pud)
 }
 
 /**
- * pmd_clear_huge - clear kernel PMD mapping when it is set
+ * pmd_clear_huge - Clear kernel PMD mapping when it is set
+ * @pmd: Pointer to the PMD entry to clear.
  *
  * Returns 1 on success and 0 on failure (no PMD map is found).
  */
@@ -705,11 +717,11 @@ int pmd_clear_huge(pmd_t *pmd)
 
 #ifdef CONFIG_X86_64
 /**
- * pud_free_pmd_page - Clear pud entry and free pmd page.
- * @pud: Pointer to a PUD.
- * @addr: Virtual address associated with pud.
+ * pud_free_pmd_page - Clear PUD entry and free PMD page
+ * @pud: Pointer to a PUD
+ * @addr: Virtual address associated with PUD
  *
- * Context: The pud range has been unmapped and TLB purged.
+ * Context: The PUD range has been unmapped and TLB purged.
  * Return: 1 if clearing the entry succeeded. 0 otherwise.
  *
  * NOTE: Callers must allow a single page allocation.
@@ -752,11 +764,11 @@ int pud_free_pmd_page(pud_t *pud, unsigned long addr)
 }
 
 /**
- * pmd_free_pte_page - Clear pmd entry and free pte page.
- * @pmd: Pointer to a PMD.
- * @addr: Virtual address associated with pmd.
+ * pmd_free_pte_page - Clear PMD entry and free PTE page.
+ * @pmd: Pointer to the PMD
+ * @addr: Virtual address associated with PMD
  *
- * Context: The pmd range has been unmapped and TLB purged.
+ * Context: The PMD range has been unmapped and TLB purged.
  * Return: 1 if clearing the entry succeeded. 0 otherwise.
  */
 int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
@@ -778,7 +790,7 @@ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
 
 /*
  * Disable free page handling on x86-PAE. This assures that ioremap()
- * does not update sync'd pmd entries. See vmalloc_sync_one().
+ * does not update sync'd PMD entries. See vmalloc_sync_one().
  */
 int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
 {