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AP_HAL_Linux: correct compilation warning 

../../../libraries/AP_HAL_Linux/RCInput_RPI.cpp:129:35: warning: ignoring return value of ‘ssize_t read(int, void*, size_t)’, declared with attribute warn_unused_result [-Wunused-result]
         ::read(file, &pageInfo, 8);
This commit is contained in:
Peter Barker 2017-08-16 19:49:28 +10:00 committed by Francisco Ferreira
parent 222dd0c9be
commit 23d91c93c8
1 changed files with 4 additions and 1 deletions
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libraries/AP_HAL_Linux/RCInput_RPI.cpp
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@ -126,7 +126,10 @@ Memory_table::Memory_table(uint32_t page_count, int version)
// Get list of available cache coherent physical addresses
for (i = 0; i < _page_count; i++) {
_virt_pages[i] = mmap(0, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS | MAP_NORESERVE | MAP_LOCKED, -1, 0);
::read(file, &pageInfo, 8);
if (::read(file, &pageInfo, 8) < 8) {
fprintf(stderr, "Failed to read pagemap\n");
exit(-1);
}
_phys_pages[i] = (void *)((uintptr_t)(pageInfo * PAGE_SIZE) | bus);
}