diff options
| author | Thomas Hellstrom <thellstrom@vmware.com> | 2015-10-30 10:06:57 +0100 |
|---|---|---|
| committer | Thomas Hellstrom <thellstrom@vmware.com> | 2015-11-05 02:26:05 -0800 |
| commit | d85780521a600b14bcfac6fc1252c78031834193 (patch) | |
| tree | 2a034e25dcd0fc9fe494591457565407513c4b5f | |
| parent | 10f9aa87a6b19b0a538aa78b9b907de78903b920 (diff) | |
vmwgfx: Introduce compatibility versions of memremap and [READ|WRITE]_ONCE
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
| -rw-r--r-- | vmwgfx_compat.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/vmwgfx_compat.h b/vmwgfx_compat.h index 158f42d..41a2c96 100644 --- a/vmwgfx_compat.h +++ b/vmwgfx_compat.h @@ -488,4 +488,19 @@ int dma_buf_fd(struct dma_buf *dmabuf, int flags); #define smp_mb__after_atomic() smp_mb__after_atomic_inc() #endif +/* memremap appeared in 4.3 */ +#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)) +#define memremap(_offset, _size, _flag) \ + (void __force *)ioremap_cache(_offset, _size) +#define memunmap(_addr) \ + iounmap((void __iomem *) _addr) +#endif + +/* + * READ_ONCE, WRITE_ONCE appeared in 3.19. + * This is a simplified version for scalar use only. + */ +#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 19, 0)) +#define READ_ONCE(_x) (*(volatile typeof(_x) *)&(_x)) +#define WRITE_ONCE(_x, _val) READ_ONCE(_x) = _val #endif |