kho: rename KHO scratch to KHO bootmem

The term "KHO scratch" is vague and overloaded.

For one, it does not accurately describe what the memory is for. From
KHO's perspective, it is memory passed by the previous kernel that is
guaranteed to have no allocations and hence it is safe to allocate from.

For another, the term is overloaded. KHO also knows to discover other
ranges of memory that don't have any preservations and are safe to
allocate from. This is done by kho_extend_scratch(). These areas, while
called "scratch", are completely different from the chunk of memory
passed by the previous kernel for early boot allocations.

Rename "KHO scratch" to "KHO boot memory", or "KHO bootmem" in short.
Update all function names, variable names, comments, and documentation
to use this.

Call the discovered areas "noprsrv", matching what memblock would see
them as. Rename kho_extend_scratch() to reflect this.

This patch largely has no functional changes. The only functional
changes are renames of debugfs files from "scratch_phys" and
"scratch_len" to "bootmem_phys" and "bootmem_len" respectively.

Signed-off-by: Pratyush Yadav (Google) <pratyush@kernel.org>
Link: https://patch.msgid.link/20260922041321.233986-4-pratyush@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/testing/memblock/internal.h b/tools/testing/memblock/internal.h
index f1974e009013..ba4d1c02fde5 100644
--- a/tools/testing/memblock/internal.h
+++ b/tools/testing/memblock/internal.h
@@ -46,7 +46,7 @@ static inline bool __is_kernel(unsigned long addr)
 
 #define __SetPageReserved(p)	((void)(p))
 
-static inline bool kho_scratch_overlap(phys_addr_t phys, size_t size)
+static inline bool kho_bootmem_overlap(phys_addr_t phys, size_t size)
 {
 	return false;
 }