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cutils: Export only buffer_is_zero

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Since the two users don't make use of the returned offset,
beyond ensuring that the entire buffer is zero, consider the
can_use_buffer_find_nonzero_offset and buffer_find_nonzero_offset
functions internal.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Message-Id: <1472496380-19706-4-git-send-email-rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Richard Henderson 2016-08-29 11:46:14 -07:00 committed by Paolo Bonzini
parent 8c70c1b0c7
commit a1febc4950
4 changed files with 6 additions and 11 deletions
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2
include/qemu/cutils.h
View file

@ -168,8 +168,6 @@ int64_t qemu_strtosz_suffix_unit(const char *nptr, char **end,
/* used to print char* safely */
#define STR_OR_NULL(str) ((str) ? (str) : "null")
bool can_use_buffer_find_nonzero_offset(const void *buf, size_t len);
size_t buffer_find_nonzero_offset(const void *buf, size_t len);
bool buffer_is_zero(const void *buf, size_t len);
/*

2
migration/ram.c
View file

@ -73,7 +73,7 @@ static const uint8_t ZERO_TARGET_PAGE[TARGET_PAGE_SIZE];
static inline bool is_zero_range(uint8_t *p, uint64_t size)
{
return buffer_find_nonzero_offset(p, size) == size;
return buffer_is_zero(p, size);
}
/* struct contains XBZRLE cache and a static page

5
migration/rdma.c
View file

@ -1934,10 +1934,7 @@ retry:
* memset() + madvise() the entire chunk without RDMA.
*/
if (can_use_buffer_find_nonzero_offset((void *)(uintptr_t)sge.addr,
length)
&& buffer_find_nonzero_offset((void *)(uintptr_t)sge.addr,
length) == length) {
if (buffer_is_zero((void *)(uintptr_t)sge.addr, length)) {
RDMACompress comp = {
.offset = current_addr,
.value = 0,

8
util/bufferiszero.c
View file

@ -192,9 +192,9 @@ static bool avx2_support(void)
return b & bit_AVX2;
}
bool can_use_buffer_find_nonzero_offset(const void *buf, size_t len) \
static bool can_use_buffer_find_nonzero_offset(const void *buf, size_t len) \
__attribute__ ((ifunc("can_use_buffer_find_nonzero_offset_ifunc")));
size_t buffer_find_nonzero_offset(const void *buf, size_t len) \
static size_t buffer_find_nonzero_offset(const void *buf, size_t len) \
__attribute__ ((ifunc("buffer_find_nonzero_offset_ifunc")));
static void *buffer_find_nonzero_offset_ifunc(void)
@ -215,12 +215,12 @@ static void *can_use_buffer_find_nonzero_offset_ifunc(void)
}
#pragma GCC pop_options
#else
bool can_use_buffer_find_nonzero_offset(const void *buf, size_t len)
static bool can_use_buffer_find_nonzero_offset(const void *buf, size_t len)
{
return can_use_buffer_find_nonzero_offset_inner(buf, len);
}
size_t buffer_find_nonzero_offset(const void *buf, size_t len)
static size_t buffer_find_nonzero_offset(const void *buf, size_t len)
{
return buffer_find_nonzero_offset_inner(buf, len);
}