ARM_DRAIN_WRITEBUF(2) | System Calls Manual (arm) | ARM_DRAIN_WRITEBUF(2)

# NAME

`arm_drain_writebuf` — drains the CPU write buffer

# SYNOPSIS

ARM Architecture Library (libarm, -larm)
`#include <machine/sysarch.h>`

int
`arm_drain_writebuf`(void);

# DESCRIPTION

`arm_drain_writebuf`() will make sure that all the entries in the processor write buffer are written out to memory.

Not all processors support this operation (currently only the SA110 does). Those processes that do not, treat this function as a null-op.

# ERRORS

`arm_drain_writebuf`() will never fail so will always return 0.

# REFERENCES

StrongARM Data Sheet

June 10, 2025 | Debian