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Extend the process_madvise() docs.

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In particular, explain why we don't have process_mremove(), and why
adding this was probably a mistake (lest it be used as precedent for
similar bad decisions in future).

Also add the missing __INTRODUCED_IN().

Test: treehugger
Change-Id: Ic2d7ef32f6e288353b5be2bffd000ad2f501bf39
This commit is contained in:
Elliott Hughes 2022-09-27 19:27:10 +00:00
parent 305399264b
commit ee41a35cc1
1 changed files with 6 additions and 1 deletions
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7
libc/include/sys/mman.h
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@ -168,8 +168,13 @@ int madvise(void* __addr, size_t __size, int __advice);
* PID file descriptor.
*
* Returns the number of bytes advised on success, and returns -1 and sets `errno` on failure.
*
* Available since API level 31. Its sibling process_mrelease() does not have a
* libc wrapper and should be called using syscall() instead. Given the lack of
* widespread applicability of this system call and the absence of wrappers in
* other libcs, it was probably a mistake to have added this wrapper to bionic.
*/
ssize_t process_madvise(int __pid_fd, const struct iovec* __iov, size_t __count, int __advice, unsigned __flags);
ssize_t process_madvise(int __pid_fd, const struct iovec* __iov, size_t __count, int __advice, unsigned __flags) __INTRODUCED_IN(31);
#if defined(__USE_GNU)