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mm/vmalloc: invoke classify_va_fit_type() in adjust_va_to_fit_type()

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Patch series "Cleanup patches of vmalloc", v2.

Some cleanup patches found when reading vmalloc code.


This patch (of 4):

adjust_va_to_fit_type() checks all values of passed in fit type, including
NOTHING_FIT in the else branch.  However, the check of NOTHING_FIT has
been done inside adjust_va_to_fit_type() and before it's called in all
call sites.

In fact, both of these functions are coupled tightly, since
classify_va_fit_type() is doing the preparation work for
adjust_va_to_fit_type().  So putting invocation of classify_va_fit_type()
inside adjust_va_to_fit_type() can simplify code logic and the redundant
check of NOTHING_FIT issue will go away.

Link: https://lkml.kernel.org/r/20220607105958.382076-1-bhe@redhat.com
Link: https://lkml.kernel.org/r/20220607105958.382076-2-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Suggested-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Baoquan He 2022-06-07 18:59:55 +08:00 committed by akpm
parent bcc728eb4f
commit 1b23ff80b3
1 changed files with 6 additions and 17 deletions
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23
mm/vmalloc.c
View File

@ -1335,10 +1335,10 @@ classify_va_fit_type(struct vmap_area *va,
static __always_inline int
adjust_va_to_fit_type(struct vmap_area *va,
unsigned long nva_start_addr, unsigned long size,
enum fit_type type)
unsigned long nva_start_addr, unsigned long size)
{
struct vmap_area *lva = NULL;
enum fit_type type = classify_va_fit_type(va, nva_start_addr, size);
if (type == FL_FIT_TYPE) {
/*
@ -1444,7 +1444,6 @@ __alloc_vmap_area(unsigned long size, unsigned long align,
bool adjust_search_size = true;
unsigned long nva_start_addr;
struct vmap_area *va;
enum fit_type type;
int ret;
/*
@ -1472,14 +1471,9 @@ __alloc_vmap_area(unsigned long size, unsigned long align,
if (nva_start_addr + size > vend)
return vend;
/* Classify what we have found. */
type = classify_va_fit_type(va, nva_start_addr, size);
if (WARN_ON_ONCE(type == NOTHING_FIT))
return vend;
/* Update the free vmap_area. */
ret = adjust_va_to_fit_type(va, nva_start_addr, size, type);
if (ret)
ret = adjust_va_to_fit_type(va, nva_start_addr, size);
if (WARN_ON_ONCE(ret))
return vend;
#if DEBUG_AUGMENT_LOWEST_MATCH_CHECK
@ -3735,7 +3729,6 @@ struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
int area, area2, last_area, term_area;
unsigned long base, start, size, end, last_end, orig_start, orig_end;
bool purged = false;
enum fit_type type;
/* verify parameters and allocate data structures */
BUG_ON(offset_in_page(align) || !is_power_of_2(align));
@ -3846,15 +3839,11 @@ retry:
/* It is a BUG(), but trigger recovery instead. */
goto recovery;
type = classify_va_fit_type(va, start, size);
if (WARN_ON_ONCE(type == NOTHING_FIT))
ret = adjust_va_to_fit_type(va, start, size);
if (WARN_ON_ONCE(unlikely(ret)))
/* It is a BUG(), but trigger recovery instead. */
goto recovery;
ret = adjust_va_to_fit_type(va, start, size, type);
if (unlikely(ret))
goto recovery;
/* Allocated area. */
va = vas[area];
va->va_start = start;