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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2024-06-05 10:34:17 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2024-06-05 15:11:21 +0300
commit9f0d88695ed6691a3e18c256d9d49862b3af6e34 (patch)
tree18b56246572ec71f8dd2f7ebc06ac1251f996f8c
parent9c2ca46391ea2ba089d5d082a0dbdd3b15b28498 (diff)
libcamera: dma_buf_allocator: Work around lack of memfd_create() in uClibc
uClibc doesn't provide a memfd_create() implementation. Fix it by using a direct syscall when the function isn't available. Fixes: ea4baaacc325 ("libcamera: DmaBufAllocator: Support allocating from /dev/udmabuf") Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
-rw-r--r--src/libcamera/dma_buf_allocator.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/libcamera/dma_buf_allocator.cpp b/src/libcamera/dma_buf_allocator.cpp
index 5ec29949..d7d08e18 100644
--- a/src/libcamera/dma_buf_allocator.cpp
+++ b/src/libcamera/dma_buf_allocator.cpp
@@ -13,6 +13,7 @@
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/stat.h>
+#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>
@@ -132,7 +133,11 @@ UniqueFD DmaBufAllocator::allocFromUDmaBuf(const char *name, std::size_t size)
std::size_t pageMask = sysconf(_SC_PAGESIZE) - 1;
size = (size + pageMask) & ~pageMask;
+#if HAVE_MEMFD_CREATE
int ret = memfd_create(name, MFD_ALLOW_SEALING | MFD_CLOEXEC);
+#else
+ int ret = syscall(SYS_memfd_create, name, MFD_ALLOW_SEALING | MFD_CLOEXEC);
+#endif
if (ret < 0) {
ret = errno;
LOG(DmaBufAllocator, Error)