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shm: don’t check for __i386__ and __x86_64__ - there are other architectures out there

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Instead, check for __SIZEOF_POINTER__ == 8, since what we’re really
interested in is whether we have enough virtual address space or not.
This commit is contained in:
Daniel Eklöf 2021-01-21 12:39:51 +01:00
parent 0bb928e02f
commit 0d07ee03f5
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GPG key ID: 5BBD4992C116573F
1 changed files with 11 additions and 11 deletions
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22
shm.c
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@ -129,7 +129,7 @@ static const struct wl_buffer_listener buffer_listener = {
.release = &buffer_release,
};
#if !defined(__i386__)
#if __SIZEOF_POINTER__ == 8
static size_t
page_size(void)
{
@ -290,12 +290,12 @@ shm_get_buffer(struct wl_shm *shm, int width, int height, unsigned long cookie,
goto err;
}
#if defined(__i386__)
off_t initial_offset = 0;
off_t memfd_size = size;
#else
#if __SIZEOF_POINTER__ == 8
off_t initial_offset = scrollable && max_pool_size > 0 ? (max_pool_size / 4) & ~(page_size() - 1) : 0;
off_t memfd_size = scrollable && max_pool_size > 0 ? max_pool_size : size;
#else
off_t initial_offset = 0;
off_t memfd_size = size;
#endif
LOG_DBG("memfd-size: %lu, initial offset: %lu", memfd_size, initial_offset);
@ -307,7 +307,7 @@ shm_get_buffer(struct wl_shm *shm, int width, int height, unsigned long cookie,
if (!can_punch_hole_initialized) {
can_punch_hole_initialized = true;
#if defined(__x86_64__) && defined(FALLOC_FL_PUNCH_HOLE)
#if __SIZEOF_POINTER__ == 8 && defined(FALLOC_FL_PUNCH_HOLE)
can_punch_hole = fallocate(
pool_fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 1) == 0;
@ -412,15 +412,15 @@ err:
bool
shm_can_scroll(const struct buffer *buf)
{
#if defined(__i386__)
#if __SIZEOF_POINTER__ == 8
return can_punch_hole && max_pool_size > 0 && buf->scrollable;
#else
/* Not enough virtual address space in 32-bit */
return false;
#else
return can_punch_hole && max_pool_size > 0 && buf->scrollable;
#endif
}
#if defined(FALLOC_FL_PUNCH_HOLE)
#if __SIZEOF_POINTER__ == 8 && defined(FALLOC_FL_PUNCH_HOLE)
static bool
wrap_buffer(struct wl_shm *shm, struct buffer *buf, off_t new_offset)
{
@ -660,7 +660,7 @@ shm_scroll(struct wl_shm *shm, struct buffer *buf, int rows,
int top_margin, int top_keep_rows,
int bottom_margin, int bottom_keep_rows)
{
#if defined(FALLOC_FL_PUNCH_HOLE)
#if __SIZEOF_POINTER__ == 8 && defined(FALLOC_FL_PUNCH_HOLE)
if (!shm_can_scroll(buf))
return false;